Overview

• The magnitude 5.8 quake struck late Monday about 102 miles west-southwest of Port Orford at roughly 13.8 km depth.
• At least six aftershocks between magnitudes 4.9 and 2.7 followed in the same offshore area through early Tuesday.
• The National Tsunami Warning Center reported no tsunami threat, and authorities logged no damage or injuries.
• USGS projected about a 78% chance of M3+ aftershocks, 34% for M4+, and roughly 6% for one or more above M5 within a week.
• The agency issued a Green alert for low expected casualties and losses as Oregon leaders spotlighted seismic preparedness, including new state building rules announced hours earlier.