Volcanos

Roundup of Global Volcanic Activity

Sinabung (Sumatra, Indonesia): Activity at the volcano has been comparably low. On average, 2-3 smaller pyroclastic flows per day have been occurring.

Sangeang Api (Indonesia): The volcano continues to erupt. On Wednesday (8 July), an explosion generated an ash plume that rose to 9,000 ft (2.7 km) altitude and drifted 35 km to the south. When flying past the volcano during our recent Batu Tara expedition, we could see a dense gas plume drifting from its summit crater.

Sirung (Pantar Island, Indonesia ): Darwin VAAC raised the aviation alert level to orange, after a plume of steam and possible light ash emissions were seen on satellite images drifting SW from the volcano last Tuesday. Local observers reported a thick steam plume rising approx. 500 m from the volcano, but the volcano observatory had no particular indications (such as increased earthquakes, sulfur smell, rumblings) of a new eruptive phase. The last confirmed activity at the volcano was likely a (single) phreatic explosion in May 2012.

Dukono (Halmahera): The volcano continues to erupt dense, but low level ash plumes that often can be detected on satellite imagery drifting 30-50 km NE.

Sabancaya (Peru): Since mid June, an increase in internal activity has been recorded at the volcano. The Geophysical Institute of Peru reported a swarm of shallow earthquakes in an area at 6 km depth approx. 7 km north of the volcano's summit. In addition, increased degassing has been observed. Both are likely signs of a probable magmatic intrusion. During the first week of July, activity decreased a bit, but remained significant. IGP does not expect a large scale eruption in the near future, but warns that sudden explosions could occur at the crater. Long-period seismicity (fluid movements) decreased to averaged of 72 events / day, while shallow rock-fracturing quakes remained frequent with an average of 9 per day.