M3.7 earthquake 63 km N of Chase, Alaska

A magnitude 3.7 earthquake struck 63 km N of Chase, Alaska on Sun, Sep 27, 2020, 7:41 PM AKDT (03:41 UTC), 102 km (64 mi) below the surface.

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
3.7	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
4.1	mb, body-wave	USGS National Earthquake Information Center	Reviewed · ±0.234 · 5 stations

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

Also felt at Cantwell.

From the USGS event page for ak020chw7jvg. U.S. Geological Survey text and figures are in the public domain.

3 people 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: 198 in the 60 days after this one and 130 in the 30 days before it.

The first 60 of 198.

From the USGS Earthquake Hazards Program and its partner networks, event ak020chw7jvg (also filed as us6000c215). Read Fri, Oct 2, 2026, 5:04 PM UTC.