M2.5 earthquake 39 km SW of Karluk, Alaska

A magnitude 2.5 earthquake struck 39 km SW of Karluk, Alaska on Sun, Aug 23, 2020, 12:12 PM AKDT (20:12 UTC), 31 km (19 mi) below the surface.

A larger quake followed: M4.1 36 km NE of Larsen Bay, 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
2.5	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
2.7	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.046 · 62 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: 64 in the 60 days after this one and 31 in the 30 days before it.

The first 60 of 64.

From the USGS Earthquake Hazards Program and its partner networks, event ak020aumt5gl (also filed as us7000bnf8). Read Fri, Oct 2, 2026, 6:27 AM UTC.