Roundup of Global Volcanic Activity – New Activity for the week of 15 March-21 March 2017

Bezymianny | Central Kamchatka (Russia) : KVERT reported that lava continued to advance down Bezymianny’s NW flank during 10-17 March, and gas-and-steam plumes rose from the crater. A thermal anomaly was visible each day in satellite images. The Aviation Colour Code remained at Orange.

Chirinkotan | Kuril Islands (Russia) : Based on satellite images, SVERT reported that on 21 March an ash plume from Chirinkotan rose to an altitude of 6 km (20,000 ft) a.s.l. and drifted 15 km E. The Aviation Colour Code was raised to Yellow (the second lowest on a four-colour scale).

Etna | Sicily (Italy) : INGV reported that during the morning of 15 March lava began to flow down the S flank of Etna’s Southeast Crater (SEC) – New Southeast Crater (NSEC) cone complex. Activity rapidly intensified at 0800, and by 1000 near-constant Strombolian explosions were generating ash plumes. The lava flow reached the base of the cone and traveled S. By late afternoon the lava was advancing on top of lava flows from the previous eruption. The intensity of the Strombolian activity reached a peak around 1840-1845, and by the evening both the eruptive activity and seismicity gradually diminished. Just before midnight a new lava flow began to effuse from a vent on the S flank of the cone. On 16 March at 1243 a phreato-magmatic explosion occurred at the front of a lava flow where it contacted an area covered with snow. An INGV-Osservatorio Etneo volcanologist was injured in the explosion, suffering minor bruises. A news article noted that about 10 people were injured during the event.

Manam | Papua New Guinea : Based on analyses of satellite imagery and model data, the Darwin VAAC reported that on 21 March weak ash emissions from Manam rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted NE and E.

Nevados de Chillan | Chile : Based on satellite and webcam views, the Buenos Aires VAAC reported that during 15-17 March gas-and-ash plumes from Nevados de Chill√°n rose to altitudes of 4-5.5 km (13,000-18,000 ft) a.s.l. and sometimes drifted NE and SW.


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