Second earthquake swarm in one week hits off Oregon on the Cascadia Subduction Zone

(Science Global News) A swarm of earthquakes shook the Cascadia Subduction Zone off of the Oregon coast on Sunday morning shortly after 9:00 a.m., according to U.S. Geological Survey (USGS). The swarm marks the second in just a 5-day span giving fair warning to coastal residents that the Big One could hit anytime.

After a string of almost a dozen minor quakes last week, the waters off the southern Oregon coast – approximately 280 miles west of Florence, Oregon – rumbled with yet another M5.3 quake on Sunday morning, at 9:10 a.m. and was followed by a series of 4 aftershocks:

M 5.3 – Off the coast of Oregon
M 3.2 – Off the coast of Oregon
M 3.0 – Off the coast of Oregon
M 3.8 – Off the coast of Oregon
M 4.4 – Off the coast of Oregon

There was no tsunami alert issued, and there are only 10 reports of it being felt on land. The quake was about seven miles beneath the sea floor.

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