Volcanos

Global Volcanic Activity - Ongoing Activity for the week of 13 November - 19 November 2019

Aira | Kyushu (Japan) : JMA reported that incandescence from Minamidake Crater (at Aira Caldera’s Sakurajima volcano) was visible at night during 11-18 November. There were 27 explosions and 29 non-explosive eruptive events detected by the seismic network. Ash plumes rose as high as 2.5 km above the crater rim and blocks were ejected 600-900 m away. An explosion at 0200 on 13 November generated an ash plume that rose 3.6 km and ejected large blocks that fell 1.7 km away. The Alert Level remained at 3 (on a 5-level scale).

Asosan | Kyushu (Japan) : JMA reported that the eruption at Asosan that began on 7 October continued through 18 November. The Tokyo VAAC reported that during 13-18 November ash plumes rose to 1.5-2.4 km (5,000-8,000 ft) a.s.l. and drifted in multiple directions. On 18 November JMA confirmed ashfall in downwind areas.

Dukono | Halmahera (Indonesia) : Based on satellite and wind model data, and information from PVMBG, the Darwin VAAC reported that during 6-12 November ash plumes from Dukono rose to an altitude of 2.1-2.3 km (7,000-8,000 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 11-12 and 14 November that sent ash plumes up to 3 km (10,00 ft) a.s.l. Ash plumes drifted E and NE. The Aviation colour Code remained at Orange (the second highest level on a four-colour scale).

Karangetang | Siau Island (Indonesia) : PVMBG reported that during 11-17 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 400 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 during 8 and 10-13 November. Strong crater incandescence was visible at night during 10-11 November. The Aviation colour Code remained at Orange.

Krakatau | Indonesia : PVMBG reported that sometimes during 11-17 November dense white plumes rose as high as 150 m above Anak Krakatau’s active vent. The seismic network detected one eruptive event; dense gray-to-black plumes rose as high as 300 m above the vent. 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.

Merapi | Central Java (Indonesia) : PVMBG reported that after the eruption at Merapi on 9 November seismicity increased and remained elevated. At 1046 on 17 November an eruption was recorded by the seismic network for two minutes and 35 seconds. An ash plume rose around 1 km above the crater rim and a pyroclastic flow traveled less than 1 km SE down the Gendol drainage. 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 during 12-19 November white-to-gray plumes from Nevados de Chillán’s Nicanor Crater rose 450-900 m above the rim and drifted SE and NE. Occasional explosions ejecting incandescent material onto the flank were visible at night. The volcano Alert Level remained at Orange, the second highest level on a four-colour scale. 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.

Sabancaya | Peru : Instituto Geofísico del Perú (IGP) reported that an average of 50 explosions of low-to-medium intensity per day occurred at Sabancaya during 11-17 November. Gas-and-ash plumes rose as high as 2.5 km above the summit and drifted SE and S. There were seven thermal anomalies identified in satellite data. 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.

Sangeang Api | Indonesia : The Darwin VAAC reported that during 14-19 November discrete and short-lived ash emissions from Sangeang Api rose to 2.4 km (8,000 ft) a.s.l. and drifted NW and W. Thermal anomalies were recorded at least during 18-19 November. The Alert Level remained at 2 (on a scale of 1-4).

Sheveluch | Central Kamchatka (Russia) : KVERT reported that a thermal anomaly over Sheveluch was identified in satellite images during 8-15 November. An ash plume rose to 9-10 km (29,500-32,800 ft) a.s.l. on 11 November; ash plumes drifted as far as 1,300 km ESE during 11-12 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 8-15 November. Occasional eruptive events during 13-15 November generated grayish white plumes that rose as high as 1.5 km above the crater rim. Ashfall was reported in Toshima Village (4 km SSW) on 14 November. The Alert Level remained at 2 (on a 5-level scale).