An earthquake, 3.8 in magnitude, was reported near Warrenton and Astoria just before 8 a.m. Wednesday, according to the U.S. Geological Survey (USGS).
Officials said the epicenter was measured approximately 10 miles from Astoria. Reports state it shook the ground around 7:52 a.m., about 21 miles deep into the ocean floor.
The USGS intensity map showed the quake was stronger near its center by the coast, and its effect diminished in areas farther inland.
‘Citizen scientists’ in several different Oregon and Washington zip codes contributed data to the USGS “Did You Feel It?” map. The tremors were strongest in Astoria, Warrenton and the southern half of the Long Beach Peninsula in Washington.
Residents in Ocean Park, 33 miles north of the epicenter, and Tillamook, 32 miles to the south, also submitted reports. There have been no reports of significant injuries or damage.
USGS officials reported the quake was not a Cascadia Subduction Zone earthquake, but an isolated event on one of the numerous other faults in Oregon and Washington. Earthquakes must be magnitude 7.0 or above to create a tsunami.