Volcanos

Global Volcanic Activity:

The eruption from Tolbachik volcano in Kamchatka continues with lava fountains at the lower vent feeding very active lava flows, but tremor levels were fluctuating. This could suggest that the magma supply has become less steady and the eruption might be approaching an end. Ash plumes from the eruption rose to up to 15,000 ft (4.5 km) altitude and are visible on satellite images.

Ash emissions were reported from Bagana volcano on Bougainville island in Papua New Guinea.

Activity of Popocatépetl volcano in Mexico has decreased to only 20 weak emissions with no or little ash content. A moderate steam plume is rising from the volcano.

2 weak explosions and mild strombolian activity was observed at Fuego volcano during the night; the lava flow has decreased to 150 m length.

Moderate activity continues at Reventador volcano in Ecuador. While direct observations are usually impossible due to cloud cover, seismic tremor pulses and explosion signals indicate frequent ash emissions and occasional mild explosions.

In Japan, Sakurajima volcano has been comparably calm as well with only few (about 1 / day average) small to moderate explosions recently.

Earthquakes have been more frequent recently at Nisyros volcano in Greece. 2 more quakes of magnitude 2.1 and 3.1 have occurred today close to the island at depths of about 10 and 20 km, respectively.

Volcanos

Global Volcanic Activity:

The eruption from Tolbachik volcano in Kamchatka continues. Tolbachik has been erupting a record of 1,200 tonnes or about 400 cubic meters of basaltic lava per second. If this number if correct, the current effusion rate would be significantly larger than the during the Great Tolbachik Fissure Eruption in 1975, when the effusion rate was about 40 m3/s on average.

Marapi volcano in West Sumatra (Indonesia) produced small ash emissions on 11 Dec morning. The volcano has been emitting ash almost every day since Marapi had become active again on 3 Aug 2011.

White Island volcano has been raised to alert level 2 after GNS scientists discovered the existence of a new spiny lava dome in the small crater left by the August phreatic explosions. It is not clear yet when exactly the dome has formed or whether it is still growing, in which case more eruptions could be expected.

Pagan volcano in the Marianas continues to produce a significant steam plume visible on satellite images, and a hot spot above the volcano was detected by MODVOLC yesterday (for the 6tth time in 2012). There are no reports of other eruptive activity.

MODIS satellite data continues to show a hotspot at Australia’s Heard Island volcano. Thermal anomalies at Heard Island have been occasionally been detected since September this year, when the often dense cloud cover did not prevent it. It is likely that some minor eruptive activity is going on at the volcano.

Popocatépetl volcano in Mexico has calmed down a bit, with only 34 weak emissions between 10-11 Dec.

Fuego volcano had a rather quiet day and the lava flow towards the Ceniza canyon had decreased to only 200 m length this morning.

Activity of Santiaguito has not changed. The lava dome is strongly degassing and glowing at night. The viscous flows, especially the new one in the southern side, remain quite active and produce constant avalanches causing ash plumes to rise and drift into westerly directions.

Volcanos

Russia’s Plosky Tolbachik volcano located far eastern Kamchatka peninsula is spilling a record 1,200 tonnes of lava every second.

Volcanos

Global volcanic activity:

Another strong explosion occurred this morning at Lokon volcano in North Sulawesi (Indonesia). The eruption produced an ash plume about 3 km high and has been followed by several smaller explosions. This marks one of the most intense phases of activity during the year.

Popocatépetl volcano in Mexico continues to produce frequent (about 3 per hour) but small emissions, only some of which contain ash.

In Guatemala, Fuego volcano continues to erupt a lava flow towards the Ceniza canyon. On 10 Dec morning, the flow had increased to 700 m length and produced glowing avalanches that reached the vegetation line. Few weak strombolian explosions, sometimes accompanied by rumbling sounds, were occurring as well.

Activity of Santiaguito remains being dominantly effusive. The new block lava flow that had recently formed on the southern flank of the Caliente dome produces glowing avalanches. The other flows on the SE side remain active as well. A constant steam plume rises from the dome to an altitude of approx. 3000 m and incandescence is seen at the dome at night.

Compared to November, the activity of Reventador volcano in Ecuador has decreased, but weak explosions with small ash emissions continue, accompanied by moderate seismic activity.

Nevado del Ruiz volcano in Colombia remains at low activity, with occasional tremor pulses and volcanic quakes, sometimes accompanied by small ash eruptions.

On December 7, 2012 at 05:47 (local time) a magnitude 3.1 volcano-tectonic earthquake occurred at 14.6 km depth southeast of main dome of Cerro Machin volcano. The quake was felt by residents near the volcano, and in the towns of Cajamarca and Ibague.

The seismic swarm in the Tjörnes Fracture Zone north off Iceland still continues at reduced intensity and there seems no end in sight. Most quakes are very small, but there are still occasional quakes at around magnitude 3, and the area remains at risk for a larger quake.

The recent earthquake swarm at Coso Volcanic Field in California seems to be over. The swarm which began in late November included hundreds of events ranging from less than magnitude 0.0 to M3.7, at depths of >10 km at the beginning to shallow 2 km near the end of the swarm. A small magmatic intrusion could have been the cause.

Volcanos

Global volcanic activity:

At the moment, the eruption from Tolbachik volcano in Kamchatka continues at decreased intensity. Seismic activity has dropped during the past days, but the lower of the eruptive vents continues to feed a lava flow that has reached more than 10 km length in the relatively flat area at the eastern foot of the volcano and spreads there.

3 other volcanoes in Kamchatka continue to erupt as well: Kizimen volcano still produces lava flows are active from the summit and on the E flank, and hot avalanches descend from the dome on the S flank.

Klyuchevskoi volcano still has strombolian activity in its summit crater.

Sheveluch volcano keeps building up its lava dome, producing a viscous lava flow and strong steaming. Explosions could occur any time.

In Indonesia, small to medium-sized explosive ash eruptions continue to occur frequently (every 1-3 days) at Lokon volcano in North Sulawesi (Indonesia). Eruption plumes were observed on 3, 6, 7, and 9 Dec and reached altitudes of (estimated) 10-17,000 ft (3-5 km) altitude, both observed from ground and via satellite data.

The activity at the new lava dome of Paluweh volcano off Flores in Indonesia continues. Ash plumes reaching 10-12,000 ft (3-3.6 km) altitude are observed almost daily.

Manam volcano in Papua New Guinea is in a phase of elevated activity. During 2 Dec and during 6-8 Dec, ash plumes rising 10-12,000 ft (3-3.6 km) altitude and drifting 20-40 nautical miles were detected via satellite.

Eruptive activity also continues at Langila volcano on New Britain Island in Papua New Guinea. An ash plume was detected at 7000 ft (2.1 km) altitude extending 60 nm to the NW on 6 Dec. Satellite images showed a sulfur dioxide plume as well.

Also in Papua NG, ash emissions occurred from Ulawun volcano during late November, the Rabaul Volcano Observatory reported to USGS.

A thermal hot spot continues to be visible at the summit of Chirpoi volcano in the Kuriles. A dense steam plume rising from the Snow peak of the volcano is sometimes visible on satellite images when the volcano is not obscured by clouds.

Spattering and flows of black carbonatite lava at Lengai volcano in Tanzania have been recently observed by climbers. The activity takes place inside the deep summit crater which formed during explosive activity in 2008. The crater is gradually being filled by spatter cones (“hornitos”) and small lava flows, but it might take many years still until the crater floor might become accessible again, in order to be able to witness this unique activity from close range.

At Kilauea volcano on Hawai’i lava flows continue to spread in the coastal flata and have been producing intermittent (and currently active) ocean entries of lava flows near Kupapa`u. The lava lake remains active at Halema’uma’u Crater with fluctuating levels. At Pu’u ‘O’o Crater on the rift zone, the perched lava lake in the NE part of the crater and spatter cones on the SE part and on the NW edge remain active as well. Lava overflowed the lava lake on 24 November and 2 December.

Popocatépetl volcano in Mexico has not changed significantly with fluctuating intensity and frequency of small emissions. The volcano produces a strong steam plume and during 7-8 Dec, CENAPRED recorded an increase to about 3 weak emissions per hour. Ash plumes rose to a maximum of 500 m above the crater and lava glow at night confirms that magma continues to rise slowly within the conduit.

In Guatemala, Fuego volcano has remained at relatively low levels of mostly effusive activity. Few and weak explosions, sometimes noisy degassing, and the continuing effusion of a lava flow, 300 m long this morning, characterize the currently low activity of the volcano.

A bit to the north, Santiaguito lava dome continues to feed several lava flows that descend slowly from the dome and produce incandescent avalanches. Compared to late November, when some larger collapses of flow fronts formed pyroclastic flows, the dome has returned to a more average lower level of activity.

In Japan, Sakurajima volcano in Japan had one of its more active days on 6 Dec with 5 moderate explosions and ash up to 10,000 ft (3 km) altitude, but has returned to an average of 1-2 explosions per day again. Ash plume heights were reported as 4-7,000 ft (1.2-2.1 km) altitude.

Weak seismic unrest continued at Ruapehu volcano in New Zealand, but has been lower compared to earlier in November.

Volcanos

Global Volcano Activity:

New Activity/Unrest: Chirpoi, Kuril Islands (Russia) | Kilauea, Hawaii (USA) | Kizimen, Eastern Kamchatka (Russia) | Kliuchevskoi, Central Kamchatka (Russia) | Langila, New Britain | Lokon-Empung, Sulawesi | Paluweh, Lesser Sunda Islands (Indonesia) | Ruapehu, North Island (New Zealand) | Santa María, Guatemala | Soputan, Sulawesi | Tolbachik, Central Kamchatka (Russia) | Ulawun, New Britain

Ongoing Activity: Karymsky, Eastern Kamchatka (Russia) | Manam, Northeast of New Guinea (SW Pacific) | Sakura-jima, Kyushu | Shiveluch, Central Kamchatka (Russia)

Volcanos

Global Volcano Activity:

Thermal anomalies detected at Tolbachik volcano, Kamchatka indicated that the lava flows were now 15 km long. The data also indicated that the activity is now concentrated on the southern part of the fissure.

A VolcanoDiscovery tour to Paluweh volcano, Indonesia from 30 November – 2 December revealed that a new lava dome is growing next to the old 1982 dome. At the time of visit the lava dome was 150 m high and is the new high point of the island, its basal diameter is estimated at around 200 – 250 m. The dome was very active, with incandescence taking place in many different places on the lava dome. A vent on the upper eastern part of the dome had periods of intense ash venting lasting several hours accompanied by a jet turbine like noises. No large pyroclastic flows have occurred from the dome. The lava dome was named “Rerombola”, meaning “the friendly one” in local dialect.

Lokon-Empung, Indonesia produced an ash plume between 1 km or 2 km high at around 16:11 (local time). Ash emissions were continuing at 17:00 (local time). On 2 December, Lokon-Empung was producing a constant emission of ash, punctuated by explosions.

Langila (Papua New Guinea) emitted an ash plume to a height of 1.5 km. A MSAT-MODIS satellite image taken on 2 December showed a small ash plume drifting to the NW. A low thermal anomaly was also detected.

8 explosions from Fuego volcano, Guatemala ejected light grey material to heights up to 4.1 KM above sea level. A lava flow continues to effuse from the summit crater.

Santa Maria’s Santiaguito lava dome complex (Guatemala) remained very active with the constant genaration of avalanches from the SW dome complex.

On 1 December, satellite images showed a minor thermal signal at Cleveland volcano.

The IG reported on 1 December that ash ejections from the new lava dome in Reventador volcano’s (Ecuador) intracaldera cone were weak. Ash ejections were a few hundred metres high, no large blocks were emitted during these explosions.

The HVO reported that lava from Kilauea volcano, Hawaii reached the sea again at around 9:30 (local time) on 2 December.

Volcanos

Tolbachik volcano eruption – Kamchatka (Russia) -Lavas from the Kamchatka Russia volcano Plosky Tolbachik have destroyed two nearby scientific camps. -Scientific bases were 10 kilometers away from the Plosky Tolbachik volcano. -Schools and kindergartens have cancelled all classes in nearby Kozyrevsk village. -Tolbachik volcano is throwing clouds of ash to the height of 3,000 meters with the potential for ash explosions up to 10 km.

Volcanos

Guatemala is on alert as the Santiaguito volcano dumps plumes of smoke and ash over nearby communities, coating cars and houses in grey dust. Residents of nearby communities woke on Wednesday morning to find a thin layer of ash coating their cars, streets and homes. White columns of smoke reached up to 5km (3.1 miles) into the sky.

Volcanos

Russia’s Tolbachik volcano on the Kamchatka Peninsula erupts explosively for first time in 36 years. Substantial ash plume rises to 33 000 feet.

Tolbachik fissure and cone

 

Indonesia’s Mount Lokon volcano in North Sulawesi erupted on Wednesday, spewing ash up to 3.5 kilometers to the sky.

Volcanos

Global Volcano Activity:

The Tokyo VAAC reported that an eruption of Tolbachik, Kamchatka began at around 10:45 (GMT). An initial ash plume rose to a height of 10 KM; ash was seen in satellite images. On 28th November, the KVERT raised the Alert Level to ORANGE. The KVERT reported that lava flows and ash explosions have broken out from the northern part of the 1975 eruptive fissure. Heavy ash falls (4 cm thick) have been reported in Krasny Yar, 35 KM away from Klyuchi village to the west. One Russian report stated “volcano’s top caldera is being filled with fresh and gushing lava” suggesting explosive eruptions and fire fountains from the summit.

One newspaper reported an eruption from Lokon-Empung volcano. The eruption occurred at 10:05 (local time) sending an ash plume to a height of 3.5 KM a.s.l. Several ash plumes were also reported by the Darwin VAAC.

Paluweh volcano, Indonesia produced 2 ash plumes. The plume travelled 30 KM to the west.

5 explosions were detected from Fuego volcano, Guatemala producing weak, grey plumes to a height of 4.1 KM a.s.l. that drifted 5 KM southwest.

Santa Maria, Guatemala, is still effusing 4 lava flows from its Santiaguito lava dome complex. Avalanches produced ash plumes that rose to heights of 3 KM and drifted 10 KM SSW. Incandescence was seen at night.

Volcanos

Global Volcanic Activity:

Only 1% of ejected material from the November 21 eruption of Tongariro, New Zealand was fresh magma.

A possible ash plume from Lokon volcano in Indonesia was reported on 26 November. The eruption was reported to have occured at around 03:00 in the morning (local time?). No ash was detected in satellite imagery.

A Magnitude 4.2 earthquake was detected at Loihi volcano in Hawaii.

Manam volcano (Papua New Guinea) produced pyroclastic flows. The MTSAT reported a thick plume from Manam on 26 October.

An ash plume from Paluweh, Indonesia drifted 60 KM WNW on 26 November.

On 25 November, a white plume from the crater of Fuego, Guatemala drifted W. A lava flow continued to effuse from Fuego’s crater, blocks that detached from the main lava flow front created avalanches. Two small explosions produced ash plumes that rose to a height of 3 KM and drifted 7 KM west.

Volcanos

For the first time in 2012, Kīlauea lava flows have entered the Pacific Ocean, adding slivers of new land to Hawai’i Island.

Volcanos

Volcanic Activity Worldwide:

Strombolian activity has resumed at the New SE crater of Etna volcano in Italy. Tremors began rising on 20 November. On the night of 21 November, incandescence was seen in Etna’s New Southeast crater. On 22 Nov, a swarm of earthquakes has started in the NW sector of the volcano at depths mostly around 20 km.

Another small eruption at Lokon volcano in North Sulawesi (Indonesia) was observed by our reporters at the volcano observatory on 20 Nov.

Popocatépetl volcano in Mexico remains with about 1 emission per per hour. Sometimes, incandescent tephra is ejected to the crater area during the more vigorous explosions.

Fuego volcano in Guatemala has an active lava flow now 800 m long and some weak mild strombolian explosions every few hours, ejecting bombs to about 100 m above the crater and producing ash clouds rising 200-500 m height above the crater.

The lava flows from the Santiaguito lava dome remain very active. At 06:09 on 22 Nov morning, a moderate pyroclastic flow was triggered by collapsing material of one of the flow fronts on the SE side.

Sakurajima volcano in Japan has returned to its normal average activity level of 1-2 moderate explosions per day, with ash clouds reaching 6-9,000 ft (1.8-2.7 km) altitude.

Thermal anomalies continue to be detected almost daily at the Snow cone, Chirpoi volcano in the Kuriles. No ash plumes have been detected which means the activity produces little to no ash.

SO2 plumes are visible on today’s NOAA satellite images from Ambrym volcano on Vanuatu and Nyiragongo volcano in the DR Congo.

Volcanos

New Zealand’s Mount Tongariro volcano has erupted, sending a black plume of gas and ash up to 2km into the air. Tourists quickly evacuated from the area.

Other Volcanic Activity Worldwide:

Ash explosions occur almost each day at Paluweh volcano (Rokatenda) off Flores, Indonesia. The activity seems to be increasing. The largest explosions have produced plumes rising up to 3 km altitude.

Marapi volcano on Sumatra (Indonesia) is showing signs of unrest or minor activity. A small steam (and possibly ash) puff was observed from the crater yesterday morning.

Popocatépetl volcano in Mexico has calmed down to only about 1-2 emissions per hour during the past days. Few of the explosions contained small amounts of ash. Glow remains visible at night.

Fuego volcano in Guatemala has picked up in activity again. Strombolian explosions have been gradually returning at the volcano: 5 were recorded between 18-19 and 13 during 19-20 Nov. They produced gray ash columns of 200-500 meters above the crater and dispersed up to 8 km towards south and southwest. The explosions ejected incandescent material to 100-150 meters above the crater and generated weak avalanches on the upper slope.

The lava flow toward Ash Canyon is still active and had increased to 800 meters length this morning.

Santiaguito’s activity remains at low levels and mainly effusive. There are only few and small explosions and the lava flows from the dome continue to be weakly active.

Pulses of volcanic tremor are regularly visible on the seismograms of Concepcion volcano in Nicaragua. In the past days, seismic activity seems to have been increased.

As Earthquake-report noted, tremor at Masaya volcano also in Nicaragua has been a bit higher recently with some few local earthquakes appearing on the seismic recordings.

A significant SO2 plume from Nevado del Ruiz volcano in Colombia is visible on the current NOAA satellite image. Seismic activity shows an increased number of small quakes and long-period events.

Reventador volcano in Ecuador continues to build up its lava dome and produce lava flows on the upper flanks. The latest report of the Instituto Geofisico warns of the possibility of increased explosive eruptions accompanied by pyroclastic flows that could affect a larger area.

After a phase of intense activity during 15-16 Nov, Sakurajima volcano has been more at average activity levels, with 1-2 daily explosions with ash plumes rising 7-8,000 ft (2.1-2.4 km) altitude.

Small earthquakes appear on the otherwise seismic recording from Ruapehu volcano in New Zealand. Alert level remains at 1 as an eruption is not thought imminent, but as a precaution, the New Zealand government has placed a safety exclusion zone of 2 km around the summit area.