M3.5 earthquake 36 km WNW of Anchor Point, Alaska

A magnitude 3.5 earthquake struck 36 km WNW of Anchor Point, Alaska on Tue, Aug 3, 2021, 1:18 AM AKDT (09:18 UTC), 81 km (51 mi) below the surface.

A larger quake followed: M3.9 5 km SSW of Kasilof, 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
3.5	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
4.1	mb, body-wave	USGS National Earthquake Information Center	Reviewed · ±0.175 · 9 stations

The USGS’s account of the effects of this earthquake.

Also felt at Anchor Point.

From the USGS event page for ak0219vq0gg9. U.S. Geological Survey text and figures are in the public domain.

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

1 person reported to the USGS what they felt; the strongest reported shaking was III, 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: at least 200 in the 60 days after this one and at least 200 in the 30 days before it.

The first 60 of at least 200.

From the USGS Earthquake Hazards Program and its partner networks, event ak0219vq0gg9 (also filed as us6000f1t2). Read Thu, Oct 1, 2026, 4:29 PM UTC.