Quake Swarm on Mount St. Helens

ByTWC - Digital•
December 14, 2016Updated: December 14, 2016, 2:20 pm ESTPublished: December 13, 2016, 11:30 am EST

A swarm of 120 imperceptible quakes on Mount St. Helen point to an eventual eruption of the volcano in Washington state.

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