Guest Thinkers — September 1, 2010

SI/USGS Weekly Volcano Activity Report for 7/1-7/2009

The latest round-up of volcano news, including the potential spotting of a dome growing at Sarychev Peak, rumblings in El Salvador and small ash plumes at Anak Krakatau.

Erik Klemetti

All the volcano news that is fit to print, all thanks to the USGS/Smithsonian GVP!

Highlights (not include Manda Hararo, Kilauea and Mayon) include

San Miguel in El Salvador has been experiencing increased seismicity. The last time the volcano erupted was in 2002.

A pilot spotted a ~10,000 foot / 3 km ash plume emanating from Anak Krakatau in Indonesia.

Another ash plume, this time at Ubinas, Peru, was spotted by pilots rising to ~6.7-9.1 km / 20-30,000 feet.

Explosions were heard from Suwanose-jima in Japan, but no associated ash plumes were spotted.

It sounds like a lava dome has been spotted at Sarychev Peak in the Kuril Islands of Russia. An “intense thermal anomaly” was noted at the summit in satellite images and gas/steam plumes have been seen each day. However, no new ash plumes have been noticed since June 16.