Swarm of mini earthquakes recorded throughout W. Washington
Excerpted:
Western Washington has experienced dozens of earthquakes so far this week, but nearly all of them have been too small for most people to notice.
As of 5 p.m. PT Thursday, eight quakes were recorded in Washington state, ranging from less than a magnitude one to a 2.6 (big enough for that some people could have felt it). Fourteen earthquakes were recorded on Wednesday, and six on Tuesday.
One quake on Wednesday — a 1.8 near Skykomish — set a record for depth, occurring 60 miles down. At that depth, the quake was in the so-called Cascadia subduction zone, where the Juan de Fuca tectonic plate is being pulled and driven beneath the North American plate. It’s that zone that has caused huge earthquakes in the Pacific Northwest’s past … and one day will again.
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