Overview

• USGS listed a magnitude 4.6 event 114 km east of Chignik, Alaska at 07:05 UTC on Sept. 24.
• The agency also recorded a magnitude 3.0 quake near Ackerly, Texas at 17:42 UTC on Sept. 23.
• In the past 24 hours, eight earthquakes above magnitude 2.5 were logged in North America and the Caribbean, including two in the continental U.S.
• Additional recent activity included a magnitude 2.5 near Pāhala, Hawaii and small quakes in Alaska near Cantwell and Petersville.
• Authorities cite USGS’s new hazard model and tools such as MyShake and California retrofit grants to guide risk reduction, with researchers noting elevated probabilities for large events in parts of the Northeast.