M2.4 earthquake 146 km SSE of Old Harbor, Alaska

A magnitude 2.4 earthquake struck 146 km SSE of Old Harbor, Alaska on Sat, Aug 9, 2025, 11:49 PM AKDT (07:49 UTC), 25 km (15 mi) below the surface.

A larger quake followed: M5.6 133 km SE of Old Harbor, Alaska. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
2.4	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
2.7	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.074 · 24 stations

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 45 in the 60 days after this one and 1 in the 30 days before it.

2.4203 km SSE of Old Harbor, AlaskaMon, Jul 21, 6:30 PM AKDT · 438 days ago · 10 km deep · 57 km away

From the USGS Earthquake Hazards Program and its partner networks, event ak025a79rm51 (also filed as us6000r050). Read Sat, Oct 3, 2026, 1:48 PM UTC.