A significant debris flow occurred in Mount St. Helens’ South Coldwater Creek at 20:45 LT on May 14, 2023, leading to the destruction of a SR 504 bridge. This incident cut off access and power to the Johnston Ridge Observatory, prompting the evacuation of a dozen people and a dog by helicopter.
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
ER reports that elevated seismicity continues at Mount Rainier (station STAR) and near Mount Saint Helens (station SHW) volcanoes in the Washington Cascades, US.
Event depths at Mount Saint Helens average around 13 km and form a radial pattern in
