USGS Volcano Notice - DOI-USGS-CVO-2026-07-10T16:05:20+00:00

Activity Update: All volcanoes in the Cascade Range of Oregon and Washington are at normal background activity levels. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State and Mount Hood, Mount Jefferson, Three Sisters, Newberry, and Crater Lake in Oregon.

Past Week Observations: During the past week, small earthquakes were detected at Mount St. Helens and Mount Rainier. On the afternoon of July 7, there was a minor debris flow detected within the Tahoma Creek at Mount Rainier. This event was similar to last week’s debris flow on July 3, and smaller than flows in 2023 and 2025.  All of these flows likely result from a glacial outburst of water originating from the South Tahoma Glacier. At Mount St. Helens, field crews conducted maintenance at several monitoring stations and sampled springs for analysis, while at Mount Hood a field crew began installation of a new monitoring site.