This September 1946 photo of Great Sitkin volcano from the east rim of the summit crater shows a steam plume rising above a lava dome emplaced in the crater in March 1945. The prominent fissures cutting the summit icecap were produced as the dome forced its way through the summit glacier. The oval-shaped blocky dome is formed of glassy basaltic rocks. Photo courtesy of U.S. Geological Survey (published in USGS Bulletin 1028-B).
AVO reported that on 31 January the Volcano Alert Level for Cleveland was raised to Watch and the Aviation Color Code was raised to Orange due to the formation of a new 40-m-wide lava dome in the summit crater that was observed in satellite imagery on 30 January. The previous lava dome was removed by explosive activity on 25 and 29 December 2011.
Sezione di Catania - Osservatorio Etneo reported that an explosion at the New Southeast Crater (New SEC) of Etna generated an ash plume at that rose 400 m above the crater on 27 January. There was an explosive ash emission from the vent followed by others that were less intense. Incandescent material and a small Strombolian explosion also occurred on the same day. On 28 January sporadic ash emissions continued.
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.