M2.9 earthquake 9 km SW of Anchorage, Alaska

A magnitude 2.9 earthquake struck 9 km SW of Anchorage, Alaska on Wed, Jul 22, 2020, 6:06 PM AKDT (02:06 UTC), 15 km (9 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
2.9	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.1	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.028 · 164 stations

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

82 people reported to the USGS what they felt; the strongest reported shaking was IV, light 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: 182 in the 60 days after this one and 88 in the 30 days before it.

The first 60 of 182.

From the USGS Earthquake Hazards Program and its partner networks, event ak0209f2eezu (also filed as us6000b2e0). Read Thu, Oct 1, 2026, 7:25 AM UTC.