Multiple Magnitude 5+ Earthquakes Strike Offshore Oregon, No Tsunami Risk

Two significant earthquakes, measuring 5.4 and 4.8 in magnitude, struck off the Oregon coast early Wednesday morning, occurring within about 20 minutes of each other at depths near 10 kilometers. The quakes, located along the Blanco Fracture Zone and near the Cascadia Subduction Zone, triggered no tsunami warnings and caused only mild shaking felt in coastal towns such as Newport and Florence. The seismic activity is part of a larger earthquake swarm extending toward Washington, with the USGS issuing a Green Alert indicating low risk of casualties or damage. These offshore events are being closely monitored due to their proximity to the Axial Seamount, a highly active underwater volcano expected to erupt soon, with scientists noting that increased seismic activity often precedes such eruptions. While no damage or injuries have been reported, seismologists emphasize ongoing aftershock potential and advise residents to stay prepared. The earthquakes underscore the Pacific Northwest's significant seismic risk linked to tectonic plate interactions beneath the region.