Volcanos

Global Volcanic Activity – Ongoing Activity for the week of 20 November – 26 November 2019

Aira | Kyushu (Japan) : JMA reported that incandescence from Minamidake Crater (at Aira Caldera’s Sakurajima volcano) was visible at night during 18-25 November. There were 17 explosions and four non-explosive eruptive events detected by the seismic network. Ash plumes rose as high as 2.7 km above the crater rim and blocks were ejected as far as 1.7 km away. The sulfur dioxide emission rate was 2,800 tons/day on 21 November. The Alert Level remained at 3 (on a 5-level scale).

Dukono | Halmahera (Indonesia) : Based on satellite and wind model data, and information from PVMBG, the Darwin VAAC reported that during 20-26 November ash plumes from Dukono rose to an altitude of 1.8-2.3 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 15-17 and 20 November that sent ash plumes up to 3 km (10,000 ft) a.s.l. Ash plumes drifted SE and NE. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Fuego | Guatemala : INSIVUMEH reported that there were 6-15 explosions per hour recorded at Fuego during 20-26 November, generating ash plumes that rose as high as 1.1 km above the crater rim and drifted 10-20 km S, SW, and W. Ashfall was reported in several areas downwind including Santa Sofía (12 km SW), Morelia (9 km SW), Panimaché I and II (8 km SW), Finca Palo Verde, San Pedro Yepocapa (8 km NW), Sangre de Cristo (8 km WSW), and El Porvenir (8 km ENE). Explosions sometimes produced shock waves that rattled houses in nearby communities. Incandescent material was ejected 100-450 m high and caused avalanches of material that occasionally traveled long distances (reaching vegetated areas) down the Seca (W), Taniluyá (SW), Ceniza (SSW), Trinidad (S), Las Lajas (SE), and Honda ravines. Lava flows advanced in the Seca and Santa Teresa (W) drainages during November, and were 300 and 800 m long on 21 and 24 November, respectively.

Ibu | Halmahera (Indonesia) : Based on PVMBG observations, satellite images, and wind data, the Darwin VAAC reported that during 20-21 and 23-25 November ash plumes from Ibu rose 1.8-2.1 km (6,000-7,000 ft) a.s.l. and drifted in multiple directions. A thermal anomaly was visible in satellite images on 21 November.

Karangetang | Siau Island (Indonesia) : PVMBG reported that during 18-24 November 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 to 300 m above the summit. 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 a thermal anomaly over Klyuchevskoy was identified in satellite images on 14 November. Strombolian activity and a series of ash explosions were visible on 20 November. The Aviation colour Code remained at Orange.

Merapi | Central Java (Indonesia) : PVMBG reported that no eruptive events at Merapi were recorded during 18-24 November, though a significant increase in the number of low-frequency earthquakes and increased carbon dioxide emissions were detected on 19 November. 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.

Pacaya | Guatemala : INSIVUMEH reported that during 20-26 November Strombolian explosions at Pacaya’s Mackenney Crater ejected material as high as 75 m above the crater rim. Lava flows traveled as far as 400 m down NW flank and produced block avalanches from the flow fronts.

Sangeang Api | Indonesia : The Darwin VAAC reported that during 20-26 November discrete and short-lived ash emissions from Sangeang Api rose to 2.4 km (8,000 ft) a.s.l. and drifted SW and W. The Alert Level remained at 2 (on a scale of 1-4).

Santa Maria | Guatemala : INSIVUMEH reported that on most days during 20-26 November there were 1-3 explosions per hour detected at Santa María’s Santiaguito lava-dome complex. Ash plumes rose 600-900 m above the complex and drifted SW and W. Avalanches of material descended the E, S, and SW flanks. Ash sometimes fell locally, and likely in finca El Faro, Santa Maria, and Viejo Palmar during 20-21 and 24-25 November.

Sheveluch | Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 15-22 November. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Suwanosejima | Ryukyu Islands (Japan) : JMA reported that incandescence at Suwanosejima’s Ontake Crater was visible during 15-22 November. Eruptive events generated grayish white plumes that rose as high as 900 m above the crater rim. Ashfall was reported in Toshima Village (4 km SSW) during 19-20 November. The Alert Level remained at 2 (on a 5-level scale).

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