M2.7 earthquake 66 km ENE of Chiniak, Alaska

A magnitude 2.7 earthquake struck 66 km ENE of Chiniak, Alaska on Sun, Aug 30, 2020, 10:25 AM AKDT (18:25 UTC), 25 km (16 mi) below the surface.

A larger quake followed: M4.7 110 km SSE of Port Graham, 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
2.7	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
2.8	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 I, not felt 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: 18 in the 60 days after this one and 14 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event ak020b66glhv (also filed as us7000bf2d). Read Fri, Oct 2, 2026, 5:06 AM UTC.