Volcanos

Roundup of Global Volcanic Activity:

Etna (Sicily, Italy): (19 Nov) Weak explosive (sporadic small strombolian eruptions) and effusive activity (weakly alimented lava flow from eastern fissure vent) continues at a decreasing trend. There are interesting small surges of activity at rhythmic intervals of 3-4 hours (visible as the smaller peaks in the tremor signal).

Klyuchevskoy (Kamchatka): Eruptive activity remains high with ongoing mild to strong explosions at the summit. A particularly intense phase yesterday produced a plume rising to 10-12 km altitude that extended SE. Today, activity has decreased, but plumes continue to reach 5-6 km altitude and drift N and NE.

Sinabung (Sumatra, Indonesia): A new explosion was reported this morning (around 7:30 UTC), sending an ash plume to estimated 30,000 ft (9 km) altitude.

Yasur (Tanna Island, Vanuatu): Geohazards reports that the volcano continues to produce near-continuous ash emissions while explosions are relatively weak. This phase of ash emissions began on 3 November and are likely to continue into the coming days and weeks. Yasur Alert Level is still maintained at Level 1. Villages and communities located close and far away from the volcano, especially those in the prevailing trade winds direction (NW) are likely to receive ash falls.

Santa María / Santiaguito (Guatemala): No significant changes in activity have occurred over the past days. INSIVUMEH reports weak explosions and continuing incandescent block avalanches from the active lava flow on the NE side of the Caliente dome.

Pacaya (Guatemala): INSIVUMEH reports ongoing mild to moderate strombolian activity with ejections of lava to up to 75 meters. Intervals between bursts are 20 seconds to one minute.

Fuego (Guatemala): Two lava flows are active on the upper slopes of the volcano at the moment, to the Taniluya (south) and Ceniza canyon (SE). The effusive activity started on 11 Nov and increased on 18 November, reaching a length of 600 m. Constant avalanches detach from the flow fronts. At the same time, explosive activity at the summit crater remained at low to moderate levels, with strombolian explosions that produce ash plumes of up to 800 m height and incandescent jets visible from distance. Some of the explosions generate shock waves that can be felt and heard in up to 15 km distance, causing roofs, doors and windows of houses to rattle. Fine ash fall occurred in Panimaché, Morelia abd Sangre de Cristo.