Volcanos

Roundup of Global Volcanic Activity

Sinabung (Sumatra, Indonesia): No significant changes in activity have occurred recently. The volcano continues to produce occasional small to moderate vulcanian-type explosions, at rates of typically one or two per day, with ash plumes that rise 1-1.5 km above the crater.

Our friend and film-maker Michael Dalton who is on site reported that the recent explosions and collapses have destroyed a significant part of the volcano's lava dome.

Sangay (Ecuador): Mild explosive (strombolian-type) activity continues at the volcano, producing small ash plumes that are sometimes spotted by Washington VAAC.

A moderate thermal anomaly continues to be visible on satellite data, and small explosion signals show up on the seismic recording.

Bristol Island (United Kingdom, South Sandwich Is): A new volcanic eruption is occurring at the remote island, recent satellite imagery reveals.

Since late April, a thermal hot spot could be detected originating the volcano's summit, and clear-weather views showed a significant plume of gas and steam, possibly containing volcanic ash, drifting from the volcano. The volcano's last known activity was in 1956. However, without closer observation is difficult to know what type of activity is going on.

Two earthquakes of magnitudes around 5.6 and 4.7 were detected to have occurred near the island on 24 and 25 April; they are likely in relation with the new activity.