Weak earthquake right below Mount Rainier volcano, Washington, USA

Last update: September 13, 2011 at 7:09 pm by By Armand Vervaeck and James Daniell

On September 13, 2011 at 09:29:28 AM a weak tremor of 2.6 magnitude occurred below the crater of Mt Rainier, the Washington volcano.

This does not mean at all that the volcano will erupt, but this tremor below the crater is one of the strongest since many months. Activity is centered below sea level below the crater (+5,000 meter below the summit

Update : the magnitude and depth has been changed by USGS to 2.4 @ a depth of 1 km (0.6 miles)

Todays tremor is by far the biggest since many months.

Typically, up to five earthquakes are recorded monthly near the summit. Swarms of five to ten shallow earthquakes over two or three days take place from time to time, predominantly in the region of 4 km below the summit (near sea level), and are thought to be caused by the circulation of hot fluids beneath Mount Rainier.

Seismic swarms (not initiated with a mainshock) are common features at volcanoes, and are rarely associated with eruptive activity.

to read more, go to:    http://earthquake-report.com/2011/09/13/weak-earthquake-right-below-mount-rainier-volcano-washington-usa/