Evergreen Photography

07/30/2025

😂

07/30/2025

07/24/2025

07/09/2025

07/09/2025

The Cascades Volcano Observatory and Pacific Northwest Seismic Network at the University of Washington detected an earthquake swarm at Mount Rainier, Washington, starting at 1:29 a.m. PDT on July 8. Thus far there have been several hundred small events, the largest reaching M1.7, with located earthquakes at depths of 1.2–3.7 miles (2–6 km). The attached map shows the current swarm in orange, with all earthquakes located since 2020 in blue. GPS stations around around the volcano have not recorded any changes in ground deformation.

Earthquake swarms are relatively common at Mount Rainier, typically occurring 1–2 times per year but usually with many fewer events than have been detected so far during the current swarm. The last large swarm at Mount Rainier occurred in 2009, when many hundreds of earthquakes (maximum=M2.3) occurred over a 3-day span.

Earthquake swarms like this have been attributed to circulation of hydrothermal fluids that are interacting with preexisting faults at shallow levels below the summit of the volcano.

Mount Rainier is well monitored by a dense network of seismic, infrasound, GPS, and we**am stations. No other changes are apparent at the volcano at this time. CVO and Pacific Northwest Seismic Network will continue to monitor activity and issue additional notices as warranted.

More information about Mount Rainier geology, hazards, and activity is accessible via https://ow.ly/jha850Wmt4I.

05/01/2025

It’s a burger…

04/06/2025