The first earthquake hit at 12:36 a.m. and had a magnitude of 3.9, and was followed at 12:39 a.m. by a 2.7 magnitude quake, according to the USGS.
Seven other smaller earthquakes followed, ranging in magnitude from 1.0 to 1.9, according to the USGS. The last quake was recorded at 3:55 a.m.
The cluster of quakes was centered on the Bean Creek drainage northeast of Mount St. Helens and about 3 miles east of Spirit Lake. The depth of the earthquakes ranged from 9.4 kilometers to 11.1 kilometers, the USGS reported.
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