Series of Quakes Strike Off West Coast: What to Know - Newsweek
The Pacific Northwest Seismic Network (PNSN) said the activity began around midnight at an offshore spreading center roughly 250 miles from the coastline, while the U.S. Geological Survey (USGS) said the events occurred between midnight and 9 a.m., and were not strong enough to generate a tsunami. PNSN emphasized the earthquakes were far from the Cascadia Subduction Zone and not at the Axial Seamount undersea volcano, and said the swarm did not pose a hazard to onshore communities in the Pacific