Mount Rainier is an active stratovolcano 45 miles southeast of Tacoma and 60 miles south-southeast of Seattle. Its last ...

"Hundreds" of small quakes – the largest being a magnitude 1.7 — had been recorded as of 9 a.m. July 8, the USGS said, citing Pacific Northwest Seismic Network data. An exact cause of the ...

A swarm of small earthquakes began early Tuesday morning beneath Mount Rainier, with more than several hundred minor tremors ...

The USGS Cascades Volcano Observatory is in an office park in east Vancouver, off Southeast 15th Street, at 1300 S.E. Cardinal Court, Building 10, Suite 100.