Series of earthquakes under Mount St. Helens, Washington

Series of earthquakes under Mount St. Helens, Washington

A series of small to moderate earthquakes shook Mount St. Helens volcano in Washington over the past couple of days. The largest was M3.9 at a depth of 10.2 km (6.2 miles) on January 3, 2018, followed by M2.7, M2.0 and M1.9. The quakes are believed to be tectonic in…

CVO: Small magnitude earthquake swarm at Mount St. Helens, US

CVO: Small magnitude earthquake swarm at Mount St. Helens, US

On March 14, 2016, the seismic network at Mount St. Helens, Washington, US began detecting small magnitude volcano-tectonic earthquakes at a depth between 2 and 7 km (1.2 to 4 miles). Earthquake rates have been steadily increasing since March, reaching nearly 40…

Mount St. Helens 2004-2008 eruption: A volcano reawakens

Mount St. Helens 2004-2008 eruption: A volcano reawakens

Mount St. Helens reawakened in late September 2004. Small magnitude earthquakes beneath the 1980-1986 lava dome increased in frequency and size, and a growing welt formed on the southeast margin of the previous lava dome and nearby portions of Crater Glacier.On October

Time-series of dome and glacier growth at Mount St. Helens (2004-2012)

Time-series of dome and glacier growth at Mount St. Helens (2004-2012)

The video bellow shows time-lapse changes in the lava dome and Crater Glacier from 2004-2012. The images were created from 1:12,000 scale vertical aerial photographs combined with ground control points from campaign GPS and targets. Photogrammetry software was used…

Mount St. Helens’ Runaway Glacier: A timelapse video of Crater Glacier

Mount St. Helens’ Runaway Glacier: A timelapse video of Crater Glacier

From 2005 to 2010, the U.S. Geological Survey-Cascades Volcano Observatory operated a remote camera on the northwest flank of Mount St. Helens. Looking into the crater, the camera captured hourly photographs of volcanic dome growth during the 2004-2008 eruption. The

Huge rockslides at Mount Rainer

Huge rockslides at Mount Rainer

Mountain climbers and bloggers have posted videos on YouTube this week of dangerous rock and ice slides on Mount Rainier.The blog Mount Rainier Climbing posted a warning to fellow mountaineers on Monday. They recommend climbers avoid the Nisqually Glacier all