Mt. Rainier rattled by rare, ongoing ‘earthquake swarm'

"Geologists detected hundreds of small earthquakes at Mount Rainier Tuesday in the largest earthquake swarm measured there in more than 15 years.
Beginning around 1:30 a.m., as many as several earthquakes a minute struck between 1 and 4 miles below the summit, in an ongoing swarm expected to last multiple days, according to the U.S. Geological Survey. The largest was a 1.7-magnitude quake." msn