M2.5 earthquake 4 km NNW of Point MacKenzie, Alaska

A magnitude 2.5 earthquake struck 4 km NNW of Point MacKenzie, Alaska on Tue, Aug 4, 2020, 2:37 PM AKDT (22:37 UTC), 38 km (23 mi) below the surface.

A larger quake followed: M4.0 7 km S of Big Lake, 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
2.6	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.028 · 172 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: 185 in the 60 days after this one and 107 in the 30 days before it.

The first 60 of 185.

From the USGS Earthquake Hazards Program and its partner networks, event ak0209z8xt21 (also filed as us6000b9fj). Read Thu, Oct 1, 2026, 2:45 AM UTC.