A crater lake occupies the summit of the youngest and southernmost volcano of Maly Semiachik. All historical eruptions of Maly Semiachik have originated from Troitsky crater. The conical peak in the middle distance is Karymsky volcano, 15 km to the SW. Karymsky was constructed within a Holocene caldera that truncates the southern flank of Dvor volcano (upper right). Photo by Dan Miller, 1990 (U.S. Geological Survey).
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On the evening of 23 February, Etna's New Southeast Crater (NSEC) was the site of a new paroxysm, the fifth in as many days. Jets of lava rose 500-800 m above the rim and the emission of pyroclastic material increased dramatically, forming a dense plume that drifted NE. The entire NE flank was covered with a sheet of incandescent material. Eyewitnesses also reported the fall of large clasts, some incandescent, in the area of Monte Baracca, 5 km NE of the NSEC. High lava fountaining continued for about 35 minutes.
According to news articles, INGEMMET recorded 536 earthquakes from Sabancaya, or about 20 per hour, during 22-23 February. About 80 homes were damaged by the earthquakes, causing some evacuations. A plume rose 100 m; plumes had been intermittently visible since 15 January.
The Smithsonian's Global Volcanism Program seeks better understanding of all volcanoes through documenting their eruptions — small as well as large — during the past 10,000 years.
