Volcanos

Roundup of Global Volcanic Activity – New Activity for the Week 20 May 2020 – 26 May 2020

Karymsky | Eastern Kamchatka (Russia) : On 25 May an ash plume from Karymsky was visible in satellite images drifting 30 km ESE, prompting KVERT to raise the Aviation Color Code to Orange (the second highest level on a four-color scale). Explosive activity on 27 May generated ash plumes that rose to 5 km (16,400 ft) a.s.l. Satellite data showed an ash plume 19×24 km in dimension continuing to drift SE.

Volcanos

Roundup of Global Volcanic Activity – Ongoing Activity for the Week 13 May 2020 – 19 May 2020

Aira | Kyushu (Japan) : JMA reported that during 11-18 May incandescence from Minamidake Crater (at Aira Caldera’s Sakurajima volcano) was visible nightly. There were 10 explosive events with plumes rising as high as 2 km above the crater rim. Material was ejected 600-900 m away from the crater. The Alert Level remained at 3 (on a 5-level scale).

Asosan | Kyushu (Japan) : JMA reported that eruptive activity at Asosan was recorded during 11-18 May. Volcanic plumes rose 600-1,000 m above the crater rim and caused ashfall in areas downwind. The sulfur dioxide emission rate was high; the rate was 1,300 tons per day on 17 May. The Alert Level remained at 2 (on a scale of 1-5).

Dukono | Halmahera (Indonesia) : Based on satellite and wind model data, the Darwin VAAC reported that during 13-19 May ash plumes from Dukono rose to 1.5-2.1 km (5,000-7,000 ft) a.s.l. and drifted in multiple directions. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.

Ebeko | Paramushir Island (Russia) : Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 8-15 May that sent ash plumes up to 4 km (13,100 ft) a.s.l. Ash plumes drifted E, causing ashfall in Severo-Kurilsk during 8-12 May. A thermal anomaly was identified in satellite data during 12-14 May. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Ibu | Halmahera (Indonesia) : The Darwin VAAC reported that on 16 May an ash plume from Ibu rose to 1.8 km (6,000 ft) a.s.l. and drifted NW based on satellite images and weather models. Later that day an ash plume rose to 13.7 km (45,000 ft) a.s.l., detached from the volcano and drifted S, and quickly dissipated. Ash plumes rose to 4.3 (14,000 ft) a.s.l. and drifted W during 17-18 May. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Karymsky | Eastern Kamchatka (Russia) : KVERT reported that a thermal anomaly over Karymsky was identified in satellite images on 7, 10, and 13 May. Steam-and-gas plumes containing some ash drifted 77 km SE on 10 May. The Aviation colour Code remained at Yellow.

Klyuchevskoy | Central Kamchatka (Russia) : KVERT reported that Strombolian activity at Klyuchevskoy was visible during 8-15 May along with a bright thermal anomaly identified in satellite images. A lava flow continued to advance down the Apakhonchich drainage on the SE flank. Vulcanian activity on 8, 10, and 13 May produced ash plume that drifted 145 km SE and E. The Aviation colour Code remained at Orange.

Rincon de la Vieja | Costa Rica : OVSICORI-UNA reported that periodic phreatic explosions at Rincón de la Vieja continued to be recorded by the seismic network and webcams during 13-19 May. Some of the events were not visually confirmed by webcams because of weather conditions or darkness. Two events, at 0524 and 0704 on 14 May produced steam plumes that rose 500 m above the crater rim. A few events were recorded the next morning. At 1127 on 15 May an event was characterized by local residents as a gas-and-steam plume rising 1 km above the crater rim and a gray, sediment-laden plume rising 400 m. Events at 0604, 0644, 0819, and 0825 on 17 May produced steam plumes that rose 500 m above the rim.

Sabancaya | Peru : Instituto Geofísico del Perú (IGP) reported that a daily average of 12 explosions occurred at Sabancaya during 11-17 May. Gas-and-ash plumes rose as high as 2.5 km above the summit and drifted NE, E, and SE. There were seven thermal anomalies identified in satellite data, originating from the lava dome in the summit crater. The Alert Level remained at Orange (the second highest level on a four-colour scale) and the public were warned to stay outside of a 12-km radius.

Semeru | Eastern Java (Indonesia) : PVMBG reported that the eruption at Semeru continued during 13-19 May, though sometimes foggy conditions prevented visual confirmation. Incandescent material from the ends of lava flows descended 200-300 m in the Kembar drainage (on the S flank), reaching a maximum distance of 1.2 km from the crater. The Alert Level remained at 2 (on a scale of 1-4), and the public was reminded to stay outside of the general 1-km radius from the summit and 4 km on the SSE flank.

Sheveluch | Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 8-15 May. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Ubinas | Peru : During 11-18 May the number of seismic events at Ubinas totaled 54 with volcano-tectonic (VT) signals being the most numerous. Sporadic emissions of gas and steam were recorded by the webcam rising to heights less than 300 m above the summit. The Alert Level remained at Orange (the second highest level on a four-colour scale) and the public were warned to stay outside of a 10-km radius.

Yasur | Vanuatu : Based on webcam images and satellite data the Wellington VAAC reported that on 19 May a brief low-level ash emission from Yasur rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted SE.

Volcanos

Roundup of Global Volcanic Activity – New Activity for the Week 13 May 2020 – 19 May 2020

No new volcanic activity was reported for this time period.

Volcanos

Roundup of Global Volcanic Activity – Ongoing Activity for the Week 6 May 2020 – 12 May 2020

Aira | Kyushu (Japan) : JMA reported that during 4-11 May incandescence from Minamidake Crater (at Aira Caldera’s Sakurajima volcano) was visible nightly. There were four eruptive events with plumes rising as high as 2.3 km above the crater rim. Three explosions were recorded; an explosion at 0531 on 9 May produced an ash plume that rose 4.2 km and ejected material 600-900 m away from the crater. JMA noted that ash plumes had not risen higher than 4 km since 8 November 2019. The Alert Level remained at 3 (on a 5-level scale).

Asosan | Kyushu (Japan) : JMA reported that eruptive activity at Asosan was recorded during 4-11 May. Volcanic plumes rose 700-900 m above the crater rim and caused ashfall in areas downwind. The sulfur dioxide emission rate was high at 3,000-4,800 tons per day during 7-8 May. The Alert Level remained at 2 (on a scale of 1-5).

Cleveland | Chuginadak Island (USA) : AVO lowered both the Volcano Alert Level and the Aviation colour Code for Cleveland to Unassigned on 7 May, noting that explosive activity on 9 January 2019 (and subsequent lava extrusion in the summit crater) was followed by an overall decrease in detected surface temperature and no further surface changes.

Dukono | Halmahera (Indonesia) : Based on satellite and wind model data, the Darwin VAAC reported that during 6-12 May ash plumes from Dukono rose to 2.1 km (7,000 ft) a.s.l. and drifted NE, E, and SE. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.

Etna | Sicily (Italy) : INGV reported that on 5 May increasing and pulsating ash emissions at Etna’s New Southeast Crater (NSEC) formed a plume that drifted SSE. The activity may have concurrently occurred with the enlargement of vent number 3. Explosive activity at Voragine Crater (VOR), with minor ash emissions and occasional visible shreds of incandescent material, was relatively mild and discontinuous. During a field inspection on 8 May, volcanologists observed that the main cone was almost unchanged and produced modest ash emissions. Strong explosive activity at a cone located E of the main cone produced a lot of ash, and ejected coarse material that fell on the W edge of VOR as well as on the S terrace of Bocca Nuova Crater. Activity at NSEC again increased; on 10 May Strombolian explosions ejected material out of the crater and onto the flanks. Concurrently, increased activity in VOR was characterized by the ejection of ballistics beyond its crater rim. After a few hours Strombolian activity in NSEC significantly decreased and explosive activity in VOR was both less intense and less frequent.

Ibu | Halmahera (Indonesia) : The Darwin VAAC reported that on 9 May an ash plume from Ibu rose to 2.1 km (7,000 ft) a.s.l. and drifted SE based on satellite images and weather models. On 12 May an ash plume rose to 2.1 km a.s.l. and drifted N. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Popocatepetl | Mexico : CENAPRED reported that each day during 5-12 May there were 94-157 steam-and-gas emissions from Popocatépetl, some of which contained minor amounts of ash. Minor explosions were recorded at 1534 and 1609 on 7 May, at 1648 on 10 May, at 1723 and 2351 on 11 May, and at 0302 and 0604 on 12 May. Crater incandescence was visible some nights. The Alert Level remained at Yellow, Phase Two (middle level on a three-colour scale).

Rincon de la Vieja | Costa Rica : OVSICORI-UNA reported periodic phreatic explosions at Rincón de la Vieja during 6-12 May. Phreatic explosions were recorded at 1624 on 6 May and 0343 on 8 May, though inclement weather conditions hindered visual confirmation. Two small emissions were noted at 1850 on 8 May and at 0020 on 9 May. An event at 1925 on 9 May generated a gas-and-steam plume that rose almost 2 km above the crater rim.

Sangeang Api | Indonesia : The Darwin VAAC reported that on 10 May a discrete ash emission from Sangeang Api rose to an altitude of 2.1 km (7,000 ft) a.s.l. and drifted E. The Alert Level remained at 2 (on a scale of 1-4).

Semeru | Eastern Java (Indonesia) : PVMBG reported that the eruption at Semeru continued during 4-10 May. Eruptive events produced dense white-gray ash plumes that rose 200-500 m above the summit. Incandescent material from the ends of lava flows descended 500-1,000 m in the Kembar and Kobokan drainages (on the S flank), reaching a maximum distance of 2 km from the crater. The Alert Level remained at 2 (on a scale of 1-4), and the public was reminded to stay outside of the general 1-km radius from the summit and 4 km on the SSE flank.

Suwanosejima | Ryukyu Islands (Japan) : JMA reported that during 1-8 May explosions occurred twice a day at Suwanosejima’s Ontake Crater and produced plumes that rose as high as 1 km above the crater rim. Material was ejected 400 m from the crater. Crater incandescence was visible nightly. Rumbling sounds were noted in a village 4 km SSW. The Alert Level remained at 2 (on a 5-level scale).

Volcanos

Roundup of Global Volcanic Activity – New Activity for the Week 6 May 2020 – 12 May 2020

No new volcanic activity was reported this week. (Ongoing activity will be reported as usual tomorrow)

Volcanos

Roundup of Global Volcanic Activity – Ongoing Activity for the Week 29 April 2020 – 5 May 2020

Aira | Kyushu (Japan) : JMA reported that during 27 April-4 May incandescence from Minamidake Crater (at Aira Caldera’s Sakurajima volcano) was visible nightly. An explosion at 2246 on 27 April generated an ash plume that rose over 3 km above the crater rim and ejected blocks 600-900 m from the crater. An eruptive event at 1510 on 2 May produced a plume that rose 1.4 km above the rim. The Alert Level remained at 3 (on a 5-level scale).

Dukono | Halmahera (Indonesia) : Based on satellite and wind model data, the Darwin VAAC reported that during 29 April-5 May ash plumes from Dukono rose to 2.1 km (7,000 ft) a.s.l. and drifted E and NE. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.

Ebeko | Paramushir Island (Russia) : Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 24 April-1 May that sent ash plumes up to 3.5 km (11,500 ft) a.s.l. The plumes drifted E, causing ashfall in Severo-Kurilsk during 25-30 April. An ash cloud was identified in satellite data on 29 April drifting 180 km SE. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Klyuchevskoy | Central Kamchatka (Russia) : KVERT reported that Strombolian and Vulcanian activity at Klyuchevskoy was visible during 24 April-1 May along with a bright thermal anomaly identified in satellite images. Ash plumes drifted about 425 km W, and a lava flow continued to descend the Apakhonchich drainage on the SE flank. The Aviation colour Code remained at Orange.

Reykjanes | Iceland : IMO reported that uplift detected in the Thorbjorn area decreased in the beginning of April and stopped later in the month. Seismicity, which had occurred across three main volcanic systems: Eldey, Reykjanes-Svartsengi, and Krýsuvík, had significantly decreased. These data indicated that the injection of magma beneath Thorbjorn had stopped, though there were indications of deformation over a larger area. On 4 May the Aviation colour Code was lowered to Green.

Rincon de la Vieja | Costa Rica : OVSICORI-UNA reported two phreatic explosions at Rincón de la Vieja during 30 April-5 May and continuing fluctuations in tremor levels. At 1610 on 30 April an event produced a gas-and-steam plume that rose 1.5 km above the crater rim. At 1317 on 5 May a steam plume rose 200 m above the rim.

Ruapehu | North Island (New Zealand) : On 4 May GeoNet reported a cooling trend of the crater lake water at Ruapehu with a current temperature of 35 degrees Celsius. During February-April the water temperature had peaked at 42 degrees Celsius. The intensity of volcanic tremor had been weak during the past month after a peak in strength in early March; tremor had declined slowly almost in conjunction with the lake water cooling trend. During a visit to the lake the previous week volcanologists noted that the lake was a uniform gray colour with a few surface slicks and no obvious upwelling. Since that visit the water level had risen and was flowing into the upper Whangaehu River. The Volcanic Alert Level remained at 1 (minor volcanic unrest) and the Aviation colour Code remained at Green.

Semeru | Eastern Java (Indonesia) : PVMBG reported that the eruption at Semeru continued during 27 April-3 May. Eruptive events produced dense white-gray ash plumes that rose 100-400 m above the summit; white plumes rose as high as 200 m. Incandescent material from the ends of lava flows descended 1 km in the Kembar and Kobokan drainages (on the S flank), reaching a maximum distance of 2 km from the crater. The Alert Level remained at 2 (on a scale of 1-4), and the public was reminded to stay outside of the general 1-km radius from the summit and 4 km on the SSE flank.

Suwanosejima | Ryukyu Islands (Japan) : JMA reported that at 0432 on 28 April an eruption at Suwanosejima’s Ontake Crater produced a plume that rose 1.6 km above the crater rim and ejected blocks as far as 800 m from the crater. An explosion at 1214 on 29 April caused glass in an office building to vibrate in a village 4 km SSW. There was a total of 64 and 50 explosions recorded on 28 and 29 April, respectively; two explosions were detected on 30 April and one on 1 May. The Alert Level remained at 2 (on a 5-level scale).

Yasur | Vanuatu : On 30 April the Vanuatu Meteorology and Geo-Hazards Department (VMGD) reported that recent visual observations at Yasur confirmed that gas-and-ash emissions were ongoing. The report noted that some of the explosions could be intense and eject bombs outside of the summit crater. Data from the seismic network indicated a decrease in activity as compared to March data. The Alert Level remained at 2 (on a scale of 0-4). VMGD had increased the radius of the permanent exclusion zone to 600 m in mid-March and that remained in effect; residents and tourists were reminded that volcanic ash and gas could reach areas impacted by trade winds.

Volcanos

Roundup of Global Volcanic Activity – New Activity for the Week 29 April 2020 – 5 May 2020

Bagana | Bougainville (Papua New Guinea) : Based on satellite and wind model data, the Darwin VAAC reported that on 1 May an ash plume from Bagana rose to 3 km (10,000 ft) a.s.l. and drifted NW and W.

Kavachi | Solomon Islands : Satellite data showed discolored water around Kavachi beginning in January 2020; the discolored plumes became more frequent, dense, and stretched for longer distances. On 25 April a satellite image showed a plume in the water that was about 15 km long but spread over an approximate area of 30 square kilometers. A small brown circle about 50,000 square meters in area indicated the presence of material over the likely vent location. An image acquired on 30 April showed a thin ribbon of discolored water extending about 50 km W of Kavachi.

Kikai | Japan : An eruption at 0609 on 29 April at Satsuma Iwo-jima, a subaerial part of Kikai’s NW caldera rim, generated a volcanic plume that rose 1 km above the crater. This was the first eruption recorded since 2 November 2019. The Alert Level remained at 2 (on a 5-level scale).

Volcanos

Roundup of Global Volcanic Activity – Ongoing Activity for the Week 22 April 2020 – 28 April 2020

Aira | Kyushu (Japan) : JMA reported that during 20-27 April incandescence from Minamidake Crater (at Aira Caldera’s Sakurajima volcano) was visible nightly. The seismic network recorded 11 eruptive events and five explosions. Ash plumes rose as high as 2.5 km above the crater rim and blocks were ejected as far as 1.1 km away from the crater. The Alert Level remained at 3 (on a 5-level scale).

Dukono | Halmahera (Indonesia) : Based on satellite and wind model data, the Darwin VAAC reported that during 22-28 April ash plumes from Dukono rose to 2.1 km (7,000 ft) a.s.l. and drifted in multiple directions. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.

Ebeko | Paramushir Island (Russia) : KVERT reported that a thermal anomaly over Ebeko was identified in satellite images on 18 and 20 April. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Irazu | Costa Rica : OVSICORI-UNA reported that on 21 April scientists confirmed that the lake in Irazú’s crater was gone and noted continuous intra-crater landslides from unstable parts of the crater.

Klyuchevskoy | Central Kamchatka (Russia) : KVERT reported that Strombolian activity at Klyuchevskoy was visible during 17-24 April along with a bright thermal anomaly identified in satellite images. Gas-and-steam plumes with some ash rose to 6 km (19,700 ft) a.s.l. and drifted 470 km E. A lava flow began to descend the SE flank in the Apakhonchich drainage at 0607 on 19 April. The Aviation colour Code remained at Orange.

Nevado del Ruiz | Colombia : On 28 April Servicio Geológico Colombiano’s (SGC) Observatorio Vulcanológico y Sismológico de Manizales reported that small ash-and-gas emissions from Nevado del Ruiz were periodically visible in webcam images and observed by Parque Nacional Natural Los Nevados officials during the previous week. These emissions drifted WSW and NW. A gas-and-steam plume rose 1.2 km above the crater rim on 21 April. The Alert Level remained at 3 (Yellow; the second lowest level on a four-colour scale).

Pacaya | Guatemala : INSIVUMEH reported that during 22-28 April Strombolian explosions at Pacaya’s Mackenney Crater ejected material as high as 100 m above the crater rim. Lava flows were active during 26-27 April, traveling about 150 m SW. Seismicity increased at 2140 on 27 April, and a lava flow on the SW flank lengthened to 400 m. Later investigation of a linear “fuming area” on the NE flank identified a forest fire as the cause.

Reventador | Ecuador : IG reported that during 21-28 April seismic data from Reventador’s network indicated a high level of seismic activity, including explosions, long-period earthquakes, and signals indicating emissions. Gas, steam, and ash emissions were observed almost daily, though cloudy weather sometimes prevented views of the volcano; IG and the Washington VAAC reported gas-and-ash emissions rising as high as 1.3 km above the crater rim and drifting W, NW, N, and NE. Incandescent blocks rolled 500-800 m down the flanks in all directions during 21-24 and 26-27 April.

Rincon de la Vieja | Costa Rica : OVSICORI-UNA reported periodic phreatic explosions at Rincón de la Vieja during 22-28 April. At 0535 on 22 April a phreatic event was recorded by the seismic network; weather conditions prevented good visual observations, though a steam plume was seen rising 1.5 km above the crater rim. There were five events recorded by the seismic network during the morning of 24 April, with most producing steam-and-gas plumes that rose 300-500 m above the crater rim. The largest event, recorded at 1020, ejected water and solid material 300 m above the crater rim and a steam plume that rose 1 km. An event at 1547 on 26 April ejected sediment 200 m above the rim and plumes 300 m above the rim. A plume with no ash rose 1 km at 1720 on 27 April.

Santa Maria | Guatemala : INSIVUMEH reported that explosions at Santa María’s Santiaguito lava-dome complex generated ash plumes that rose 800-900 m above the crater and drifted as far as 1.2 km NW, W, and SW. Avalanches of blocks descended the S, SE, and E flanks of Caliente cone. Ashfall was recorded in areas downwind including Loma Linda, San Marcos Palajunoj, and La Florida and Santa Marta fincas.

Semeru | Eastern Java (Indonesia) : PVMBG reported that the eruption at Semeru continued during 22-28 April. Eruptive events produced dense gray ash plumes that rose as high as 500 m above the summit. Lava blocks traveled 300 m from the ends of lava flows in the Kembar drainage. The Alert Level remained at 2 (on a scale of 1-4), and the public was reminded to stay outside of the general 1-km radius from the summit and 4 km on the SSE flank.

Sheveluch | Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 17-24 April, and a plume of re-suspended ash drifted 140 km NE on 18 and 20 April. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Suwanosejima | Ryukyu Islands (Japan) : JMA reported that during 17-24 April incandescence from Suwanosejima’s Ontake Crater was visible nightly. Small eruptions occasionally occurred, along with an explosion on 24 April, producing gray-white plumes that rose as high as 600 m above the crater rim and ejected material as far as 600 m from the crater. Rumbling sounds were noted in a village 4 km SSW. The Alert Level remained at 2 (on a 5-level scale).

Volcanos

Roundup of Global Volcanic Activity – New Activity for the Week 22 April 2020 – 28 April 2020

Karymsky | Eastern Kamchatka (Russia) : KVERT reported that a thermal anomaly over Karymsky was identified in satellite images on 17 and 21 April; gas-and-steam plumes containing some ash drifted 80 km SE on those same days. The Aviation Colour Code remained at Yellow (the second lowest level on a four-colour scale).

Krakatau | Indonesia : PVMBG reported that during 21-28 April weather conditions around Anak Krakatau often prevented visual observations, though white plumes were sometimes seen rising 25-50 m high. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km-radius hazard zone from the crater.

Volcanos

Roundup of Global Volcanic Activity – Ongoing Activity for the Week 15 April 2020 – 21 April 2020

Aira | Kyushu (Japan) : JMA reported that during 13-20 April incandescence from Minamidake Crater (at Aira Caldera’s Sakurajima volcano) was visible nightly. The seismic network occasionally recorded very small eruptive events and three explosions. Ash plumes rose as high as 2.5 km above the crater rim. The sulfur dioxide emission rate was high at 1,700 and 2,000 tons/day on 14 and 17 April, respectively. The Alert Level remained at 3 (on a 5-level scale).

Asosan | Kyushu (Japan) : JMA reported that eruptive activity at Asosan was recorded during 13-20 April. Gray-white ash plumes rose 800-1,100 m above the crater rim and caused ashfall in areas downwind. The sulfur dioxide emission rate was somewhat high at 1,600 and 1,200 tons per day on 14 and 16 April, respectively. The Alert Level remained at 2 (on a scale of 1-5).

Bezymianny | Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Bezymianny was identified in satellite images during 10-17 April. Gas-and-steam emissions persisted. The Aviation colour Code remained at Yellow (the second lowest level on a four-colour scale).

Dukono | Halmahera (Indonesia) : Based on satellite and wind model data, the Darwin VAAC reported that during 15-21 April ash plumes from Dukono rose to 2.1 km (7,000 ft) a.s.l. and drifted in multiple directions. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.

Ebeko | Paramushir Island (Russia) : Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions on 13 April that sent ash plumes up to 2.5 km (8,200 ft) a.s.l. Ash plumes drifted SE. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Klyuchevskoy | Central Kamchatka (Russia) : KVERT reported that Strombolian activity at Klyuchevskoy was visible during 10-17 April along with a bright thermal anomaly identified in satellite images. Gas-and-steam plumes with some ash rose to 6 km (19,700 ft) a.s.l. and drifted 200 km S and E on those same days. The Aviation colour Code remained at Orange.

Kuchinoerabujima | Ryukyu Islands (Japan) : JMA reported that during 13-20 April very small eruptive events at Kuchinoerabujima’s Shindake Crater produced grayish-white plumes that rose 600 m above the crater rim. An event at 0147 on 20 April generated a grayish-white plume that rose 800 m and drifted SE. The Alert Level remained at 3 (the middle level on a scale of 1-5).

Merapi | Central Java (Indonesia) : PVMBG reported relatively quiet conditions at Merapi during 13-19 April. White plumes of variable densities rose as high as 300 m above the crater that had formed on 10 April. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to stay outside of the 3-km exclusion zone.

Nevados de Chillan | Chile : ONEMI and SERNAGEOMIN reported that an explosive event at Nevados de Chillán’s Nicanor Crater recorded at 1333 on 21 April was associated with a long-period earthquake signal. The explosion produced a gas-and-ash plume that rose 2.4 km above the vent and drifted SE. The Alert Level remained at Yellow, the second lowest level on a four-colour scale, and residents were reminded not to approach the crater within 3 km. ONEMI maintained an Alert Level Yellow (the middle level on a three-colour scale) for the communities of Pinto, Coihueco, and San Fabián, and stated that the public should stay at least 3 km away from the crater on the SW flank and 5 km away on the ENE flank.

Rincon de la Vieja | Costa Rica : OVSICORI-UNA reported periodic hydrothermal explosions at Rincón de la Vieja during 15-21 April. At 0306 on 15 April a phreatic eruption was recorded by the seismic network; weather conditions prevented visual confirmation, though local residents reported lahars in the Pénjamo, Azufrada, and Azul rivers. A steam plume from a phreatic event at 0929 on 18 April rose 200 m above the crater rim. Several small events were detected during the morning of 19 April but none produced plumes that rose above the rim. At 1014 a phreatic eruption ejected water and sediment 300 m above the crater rim and onto the flank, and produced a steam-and-gas plume that rose 1.5 km above rim. A lahar followed the activity. During 20-21 April several low-energy puffs of gas-and-steam were recorded. A low-energy event at 0626 on 21 April generated a steam plume that rose 1 km above the crater rim.

Sheveluch | Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 10-17 April. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Shishaldin | Fox Islands (USA) : On 16 April AVO reported that seismicity at Shishaldin had decreased during the past two weeks, though it remained slightly above background levels. Additionally, satellite images showed no new lava nor changes in the crater area, and a decrease in surface temperatures. The Volcano Alert Level was lowered to Advisory and the Aviation colour Code was lowered to Yellow.

Suwanosejima | Ryukyu Islands (Japan) : JMA reported that during 10-17 April incandescence from Suwanosejima’s Ontake Crater was visible nightly. Small eruptions occasionally occurred, along with an explosion on 15 April, producing gray-white plumes that rose as high as 1 km above the crater rim; plumes drifted N on 15 April. Rumbling sounds were noted in a village 4 km SSW. The Alert Level remained at 2 (on a 5-level scale).

Whakaari/White Island | North Island (New Zealand) : On 16 April GeoNet reported that data collected from Whakaari/White Island came from instrumentation on the island only, including seismic stations, webcams, and sulfur dioxide gas emission sensors; no overflights had been conducted over the past three weeks. GeoNet concluded that there were no significant changes in sulfur dioxide flux, seismicity remained low, and the active vents area appeared unchanged since early March. High temperatures from the vent area were apparent at night. The Volcanic Alert Level remained at 2 and the Aviation colour Code remained at Yellow.

Volcanos

Roundup of Global Volcanic Activity – New Activity for the Week 15 April 2020 – 21 April 2020

Karymsky | Eastern Kamchatka (Russia) : KVERT reported that over the past few weeks a minor amount of ash was present in Karymsky’s gas-and-steam plumes and trace ash deposits were visible on the surrounding snow. A very weak thermal anomaly was identified in satellite data on 6 April. The Tokyo VAAC reported that on 18 April an ash plume rose to 1.5 km (5,000 ft) a.s.l. and drifted SE based on satellite data and information from UHPP (Petropavlovsk-Kamchatsky Airport). The Aviation colour Code was raised to Yellow (the second lowest level on a four-colour scale) on 19 April.

Krakatau | Indonesia : PVMBG reported that during 13-19 April dense gray eruption plumes from Anak Krakatau rose as high as 50 m above the crater rim, and white plumes rose 25-100 m above the summit. Satellite data acquired on 15 April revealed new lava flows from the 10-11 April eruption covering the vent and extending the coastline W. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km-radius hazard zone from the crater.

Lokon-Empung | Sulawesi (Indonesia) : An increased number of volcanic earthquakes over a few days prompted PVMBG to issue a VONA on 15 April and raise the Aviation colour Code for Lokon-Empung to Yellow (the second lowest on a four-colour scale). The volcano Alert Level remained at 2 (on a scale of 1-4). Residents and tourists were reminded not to approach the crater within a radius of 1.5 km.

Semeru | Eastern Java (Indonesia) : PVMBG reported that the eruption at Semeru continued during 1-16 April. Eruptive events produced gray ash plumes that rose 400-600 m above the summit. Additionally, gray-to-white gas plumes from Jonggring-Seloko Crater rose 200-400 m; incandescent material was ejected 10-20 m above the crater. Incandescent lava flows traveled 500-1,000 m down the Kembar, Bang, and Kobokan drainages (on the S flank). At 0608 on 17 April a pyroclastic flow descended 2 km along the Bang drainage. Ash plumes drifted N, SE, and SW during 15-16 and 20-21 April. The Alert Level remained at 2 (on a scale of 1-4), and the public was reminded to stay outside of the general 1-km radius from the summit and 4 km on the SSE flank.

Volcanos

Roundup of Global Volcanic Activity – Ongoing Activity for the Week 8 April 2020 – 14 April 2020

Aira | Kyushu (Japan) : JMA reported that during 6-13 April incandescence from Minamidake Crater (at Aira Caldera’s Sakurajima volcano) was visible nightly. The seismic network recorded 16 eruptive events and 6 explosions. Ash plumes rose as high as 2 km above the crater rim and material was ejected 300-500 m away from the crater. The Alert Level remained at 3 (on a 5-level scale).

Dukono | Halmahera (Indonesia) : Based on satellite and wind model data, the Darwin VAAC reported that during 8-14 April ash plumes from Dukono rose to 2.1-3 km (7,000-10,000 ft) a.s.l. and drifted in multiple directions. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.

Ebeko | Paramushir Island (Russia) : Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 4-5 and 9 April that sent ash plumes up to 1.5 km (4,900 ft) a.s.l. Ash plumes drifted NE. A thermal anomaly was visible in satellite images on 5 April. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Fuego | Guatemala : In a special report from 6 April INSIVUMEH reported a change in the eruptive pattern at Fuego indicated by seismic and acoustic data. Lava effused from a summit vent and traveled 400 m down the Ceniza (SSW) drainage. Avalanches of material descended the flank as far as 1 km, reaching vegetated areas. Explosions caused rumbling, shock waves, and ash plumes that rose 1.1 km above the summit. The report noted that this activity was similar to the eight-day phase during 16-24 March. There were 5-14 explosions per hour recorded during 7-14 April, generating ash plumes that rose as high as 1.1 km above the crater rim and generally drifted 10-20 km in multiple directions. Minor ashfall was reported in several areas downwind including Santa Sofía (12 km SW), Morelia (9 km SW), Panimaché I and II (8 km SW), Quisache, and Sangre de Cristo (8 km WSW). Explosions sometimes produced shock waves that rattled houses in communities within a 25-km radius. Incandescent material was ejected 100-600 m high. Lava flows in the Ceniza drainage had variable lengths during the week, from 200 to 600 m long. Avalanches of blocks from the lava flows traveled sometimes long distances, and in some cases set fire to vegetated areas.

Ibu | Halmahera (Indonesia) : The Darwin VAAC reported that during 8-10 and 13 April ash plumes from Ibu rose 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted N, SE, and S based on satellite images and weather models. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Klyuchevskoy | Central Kamchatka (Russia) : KVERT reported that Strombolian activity at Klyuchevskoy was visible during 3-10 April along with a bright thermal anomaly identified in satellite images. Vulcanian activity was visible during 6-9 April; ash plumes drifted 200 km S, SE, and E at altitudes of 5.5-6 km (18,000-19,700 ft) a.s.l. on those same days. The Aviation colour Code remained at Orange.

Mayon | Luzon (Philippines) : PHIVOLCS reported that during 7-14 April white steam plumes periodically emitted from Mayon rose as high as 400 m above the summit and drifted mainly NW, W, and SW. Crater incandescence was visible nightly. The Alert Level remained at 2 (on a 0-5 scale) and PHIVOLCS reminded residents to stay away from the 6-km-radius Permanent Danger Zone and the 7-km Extended Danger Zone on the SSW and ENE flanks.

Merapi | Central Java (Indonesia) : PVMBG reported that an eruption at Merapi began at 0910 on 10 April and lasted for one minute and 43 seconds. A gray ash plume rose as high as 3 km above the summit and drifted NW. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to stay outside of the 3-km exclusion zone.

Rincon de la Vieja | Costa Rica : OVSICORI-UNA reported periodic hydrothermal explosions at Rincón de la Vieja during 8-14 April. A possible small eruption occurred at 0658 on 8 April and was followed by a decrease in the amplitude of tremor signals. Beginning at 0033 on 11 April a small-scale hydrothermal explosion was recorded by the infrasoiund and seismic networks for 20 seconds. Water and sediment was ejected onto the upper flanks of the volcano. The event was recorded by the webcam located in Sensoria, 4 km N of the crater. In the morning local residents noted that the water in the Pénjamo River was milky white. A small hydrothermal explosion at 0251 on 13 April produced a plume of steam and gas that rose 500 m.

Sheveluch | Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 3-10 April. Explosions on 8 April generated ash plumes that rose to 10 km (32,800 ft) a.s.l. and drifted 526 km SE during 8-9 April. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Suwanosejima | Ryukyu Islands (Japan) : JMA reported that during 3-10 April incandescence from Suwanosejima’s Ontake Crater was visible nightly. Small eruptions occasionally occurred, producing gray-white plumes that rose as high as 900 m above the crater rim; rumbling sounds were noted in a village 4 km SSW. The Alert Level remained at 2 (on a 5-level scale).

Taal | Luzon (Philippines) : PHIVOLCS reported that during 8-9 April steam plumes rose 100-300 m above the Taal’s main vent and drifted SW. Weak steaming (plumes up to 20 m high) from ground cracks was visible during 8-14 April along the Daang Kastila trail which connects the N part of Volcano Island to the N part of the main crater. PHIVOLCS had lowered the Alert Level to 1 (on a scale of 0-5) on 19 March and recommended no entry onto Volcano Island, the area defined as the Permanent Danger Zone.

Volcanos

Roundup of Global Volcanic Activity – New Activity for the Week 8 April 2020 – 14 April 2020

Kerinci | Indonesia : According to the Darwin VAAC, PVMBG reported that on 10 April an ash plume from Kerinci rose 600 m above the summit and drifted NW. On 13 April an observer noted that an ash plume rose to 900 m above the summit; the emission was not visible in satellite data. An ash plume rose 400 m above the summit on 14 April; meteorological clouds obscured views. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 3-km exclusion zone.

Krakatau | Indonesia : PVMBG reported that at 2158 and 2235 on 10 April an eruptive event at Anak Krakatau generated dense white, gray, and black ash plumes that rose as high as 2 km above the summit and drifted S and E. The events were followed by Strombolian activity that ejected incandescent material onto the crater floor and summit areas; video revealed lightning visible in the ash cloud. The Darwin VAAC issued a notice at 0145 on 11 April stating that an eruption plume had risen to 14.3 km (47,000 ft) a.s.l., but noted low confidence in the altitude due to the possible mixing of the eruption plume with meteorological storm clouds. An intense thermal anomaly was visible. An hour later the VAAC reported an on-going sulfur-rich plume rising to 11.3 km (37,000 ft) a.s.l. and drifting W; the previous plume remained visible and continued to drift NW. Later that day ash plumes rose to 3 km (10,000 ft) a.s.l. and drifted N. During 12-13 April plumes comprised mostly of sulfur dioxide and steam rose to 3 km (10,000 ft) a.s.l.; the plumes did not have a strong ash signal. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km-radius hazard zone from the crater.

Semeru | Eastern Java (Indonesia) : PVMBG reported that during 6-12 April dense white-gray plumes rose 200-500 m above Semeru’s summit. Incandescent material was ejected 20 m above the Jonggring-Seloko Crater. Incandescent material from the ends of lava flows descended 200-1,000 m, reaching a maximum distance of 750-1,500 m from the crater. The Alert Level remained at 2 (on a scale of 1-4), and the public was reminded to stay outside of the general 1-km radius from the summit and 4 km on the SSE flank.

Shishaldin | Fox Islands (USA) : AVO reported elevated seismicity at Shishaldin during 8-13 April characterized by occasional low-frequency earthquakes. Minor steaming from the summit crater was sometimes seen in satellite and webcam data. A small thermal anomaly was visible in satellite data during 8-9 April. The Volcano Alert Level remained at Watch and the Aviation colour Code remained at Orange.

Volcanos

Roundup of Global Volcanic Activity – Ongoing Activity for the Week 1 April 2020 – 7 April 2020

Aira | Kyushu (Japan) : JMA reported that during 30 March-6 April incandescence from Minamidake Crater (at Aira Caldera’s Sakurajima volcano) was visible nightly. The seismic network recorded 22 eruptive events and one explosion (at 1558 on 4 April). The highest plume during the period rose to 3.8 km above the crater rim, visible at 1621 on 4 April. Material was ejected 500-900 m away from the crater. The Alert Level remained at 3 (on a 5-level scale).

Asosan | Kyushu (Japan) : JMA reported that eruptive activity at Asosan was recorded during 9-16 March. Gray-to-white ash plumes rose as high as 1 km above the crater rim and caused ashfall in areas downwind. The sulfur dioxide emission rate was high; the rate on 2 April was 1,900 tons per day. The Alert Level remained at 2 (on a scale of 1-5).

Dukono | Halmahera (Indonesia) : Based on satellite and wind model data, the Darwin VAAC reported that during 1-7 April ash plumes from Dukono rose to 1.8-2.4 km (6,000-8,000 ft) a.s.l. and drifted in multiple directions. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 2-km exclusion zone.

Ebeko | Paramushir Island (Russia) : Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 29 and 31 March and 1-2 April that sent ash plumes up to 2.2 km (7,200 ft) a.s.l. Ash plumes drifted NE and E, causing ashfall in Severo-Kurilsk on 1 April. A thermal anomaly was identified in satellite images during 30-31 March. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Ebeko | Paramushir Island (Russia) : Volcanologists in Severo-Kurilsk (Paramushir Island), about 7 km E of Ebeko, observed explosions during 29 and 31 March and 1-2 April that sent ash plumes up to 2.2 km (7,200 ft) a.s.l. Ash plumes drifted NE and E, causing ashfall in Severo-Kurilsk on 1 April. A thermal anomaly was identified in satellite images during 30-31 March. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Ibu | Halmahera (Indonesia) : The Darwin VAAC reported that on 2 April an ash plume from Ibu rose to 2.1 km (7,000 ft) a.s.l. and drifted SW based on satellite images and weather models. On 7 April an ash plume rose to 1.8 km (6,000 ft) a.s.l. and drifted S. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to stay at least 2 km away from the active crater, and 3.5 km away on the N side.

Karangetang | Siau Island (Indonesia) : PVMBG reported that during 30 March-5 April lava continued to effuse from Karangetang’s Main Crater (S), traveling as far as 1.8 km down the Nanitu, Pangi, and Sense drainages on the SW and W flanks. Sometimes dense white plumes rose up to 300 m above the summit; foggy weather occasionally prevented observations. Incandescence from both summit craters was visible at night. The Alert Level remained at 2 (on a scale of 1-4).

Klyuchevskoy | Central Kamchatka (Russia) : KVERT reported that Strombolian activity at Klyuchevskoy was visible during 27 March-3 April, and a bright thermal anomaly was identified in satellite images those same days except for 1 April. Vulcanian activity was visible during 29-20 March; ash plumes drifted as far as 455 km E and NE at altitudes of 5.5-6 km (18,000-19,700 ft) a.s.l. on those same days. The Aviation colour Code remained at Orange.

Kuchinoerabujima | Ryukyu Islands (Japan) : JMA reported that during 30 March-3 April white plumes rose 500 m above the rim of Kuchinoerabujima’s Shindake Crater. Sulfur dioxide emissions were at high levels. Very small eruptive events during 5-6 April generated plumes that rose 900 m and merged into weather clouds. The Alert Level remained at 3 (the middle level on a scale of 1-5).

Merapi | Central Java (Indonesia) : PVMBG and BPPTKG reported that incandescence from Merapi’s summit crater was visible at night and in the morning during 30 March-5 April. White plumes with variable densities rose as high as 600 m above the summit. An eruption at 1510 on 2 April generated an ash plume that rose 3 km above the summit. The morphology of the lava dome in the summit crater changed slightly based on a comparison of photos (taken from the DELES 3 station, SW) from 15 March to 2 April. The Alert Level remained at 2 (on a scale of 1-4), and residents were warned to stay outside of the 3-km exclusion zone.

Nevados de Chillan | Chile : The Buenos Aires VAAC reported that during 1-2 and 4-6 April ash plumes from Nevados de Chillán rose to altitudes of 3.7-4.3 km (12,000-14,000 ft) a.s.l. and drifted N, NE, E, and SE, based on webcam and satellite images.

Rincon de la Vieja | Costa Rica : OVSICORI-UNA reported that occasional low-frequency and low-amplitude volcanic earthquakes were ongoing at Rincón de la Vieja. A steam explosion was recorded at 0240 on 1 April. An eruption at 0824 on 4 April generated a plume that rose 1 km above the crater rim. Continuous activity during part of 6-7 April produced emissions rising 50 m above the crater rim.

Sangay | Ecuador : IG reported a high level of activity at Sangay during 1-7 April. Weather clouds often prevented visual observations of the volcano; according to Washington VAAC notices ash plumes rose 570 m above the summit and drifted NW, W, and SW during 2-4 April. Signals indicating lahars were recorded by the seismic network on 2 and 5 April. Incandescent blocks were seen descending the S flank during a break in cloud cover on 4 April.

Semisopochnoi | United States : On 1 April AVO reported that seismic, infrasound, and satellite data collected during the previous two weeks indicated no signs of eruptive activity at Semisopochnoi; the Aviation colour Code was lowered to Yellow and the Volcano Alert Level was lowered to Advisory. A crater lake and robust steam plume were both identified in recent satellite images.

Sheveluch | Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 27 March-3 April. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Shishaldin | Fox Islands (USA) : AVO reported elevated seismicity at Shishaldin during 1-7 April characterized by weak continuous tremor and occasional low-frequency earthquakes. The webcam recorded steam plumes rising from the summit crater on 1 April. Weakly elevated surface temperatures were visible in satellite images on a few days. The Volcano Alert Level remained at Watch and the Aviation colour Code remained at Orange.

Suwanosejima | Ryukyu Islands (Japan) : JMA reported that during 27 March-3 April incandescence from Suwanosejima’s Ontake Crater was visible nightly. An eruptive event on 2 April produced a grayish-white plume that rose 800 m above the crater rim; ringing sounds were noted in a village 4 km SSW. The Alert Level remained at 2 (on a 5-level scale).

Yasur | Vanuatu : Based on webcam images and information from the Vanuatu Meteorology and Geo-Hazards Department (VMGD), the Wellington VAAC reported that during 2-3 April low-level ash plumes from Yasur rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted N and SE. Ashfall was confirmed on the SSW parts of the island.

Volcanos

Roundup of Global Volcanic Activity – New Activity for the Week 1 April 2020 – 7 April 2020

Kerinci | Indonesia : PVMBG reported that at 0854 on 6 April a brown ash emission rose 500 m above Kerinci’s summit and drifted NNW. Another brown emission was visible the next day at 0717, rising at least 400 m and drifting ENE. The Alert Level remained at 2 (on a scale of 1-4), and the public was warned to remain outside of the 3-km exclusion zone.

Piton de la Fournaise | Reunion Island (France) : OVPF reported that a seismic crisis at Piton de la Fournaise was recorded during 0815-0851 on 2 April and was accompanied by rapid deformation (10-20 microradians). After a lull in activity for about three hours, volcanic tremor beginning at 1220 indicated the likely arrival of magma at the surface, though weather conditions prevented visual confirmation. During an overflight that day around 1500 observers confirmed a fissure eruption around 1,900 m elevation on the E flank about 1.7 km from the center of Dolomieu Crater, and just below the 10-16 February eruption site. Lava fountains rose no more than 30 m. By 0625 on 3 April lava flows had traveled as far as the top of Grandes Pentes, at 1,000 m elevation and 3.8 km from RN2 (the national road). By 1500 no significant deformation had been recorded and five volcano-tectonic earthquakes were located less than 2 km deep. The report noted that the weak seismicity and minor deformation indicated that the magma followed an existing pathway while propagating towards the surface. The average lava-flow rate during 3-4 April was between 2 and 45 cubic meters per second with an average around 7-10 cubic meters per second. Lava flows continued to advance, reaching 800 m elevation. During 0400-0900 on 5 April the seismic network recorded 10 volcano-tectonic earthquakes (less than 2 km deep) prompting a request for an overflight and an inspection of the flow field. The distal end of the lava flow was located at 550 m elevation, about 2.7 km from RN2. The lava-flow rate had increased to between 3 and 63 cubic meters per second with an average around 24.2 cubic meters per second on 5 April and increased again to an estimate average of 30 cubic meters per second on 6 April. The longest flow had stopped advancing with activity focused on a new, more southern lava flow. By 1000 on 6 April the southern lava flow had descended to 360 m elevation, or about 2 km from RN2, as mapped during an overflight. Large quantities of Pele’s hair were located in areas to the N, especially in La Plaine des Cafres. A sharp decrease in tremor intensity was recorded around 1330 on 6 April, signaling the end of the eruption.

Semeru | Eastern Java (Indonesia) : PVMBG reported that during 30 March-5 April white plumes rose 100 m above Semeru’s summit. Incandescent material was ejected 10-50 m above the Jonggring-Seloko Crater. Incandescent material from the ends of lava flows descended 700 m, reaching a maximum distance of 950 m from the crater. The Alert Level remained at 2 (on a scale of 1-4), and the public was reminded to stay outside of the general 1-km radius from the summit and 4 km on the SSE flank.

Soputan | Sulawesi (Indonesia) : The Darwin VAAC reported that on 2 April an ash plume from Soputan was seen by a pilot drifting W at an altitude of 4.3 km (14,000 ft) a.s.l.