Mount Rainier is rattling with the most powerful earthquake swarm scientists have ever recorded at the volcano. Why it ...

The so-called earthquake swarm at Mount Rainier dwindled Friday but has surpassed the last large event at the volcano in 2009, the USGS said.

The last big quake swarm was in 2009 and measured over 1,000 quakes over three days, peaking at magnitude 2.3.Mt. Rainier is the closest volcano to the Puget Sound metro area, nestled about 45 ...

The so-called earthquake swarm at Mount Rainier dwindled Friday but has surpassed the last large event at the volcano in 2009, the USGS said.

Mt. Rainier will experience about nine quakes in a typical month. The last big quake swarm was in 2009 and measured over 1,000 quakes over three days, peaking at magnitude 2.3.