M1.6 earthquake 22 km SW of Point MacKenzie, Alaska

A magnitude 1.6 earthquake struck 22 km SW of Point MacKenzie, Alaska on Sun, Aug 2, 2020, 6:41 PM AKDT (02:41 UTC), 41 km (25 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
1.6	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
1.8	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.052 · 48 stations

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 194 in the 60 days after this one and 100 in the 30 days before it.

The first 60 of 194.

From the USGS Earthquake Hazards Program and its partner networks, event ak0209x9imc9 (also filed as us7000bi22). Read Fri, Oct 2, 2026, 7:43 AM UTC.