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

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.

Magnitude 5.3 earthquake hits the Cascadia subduction zone off Oregon coast on July 29 2018.
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: READ MORE