M1.8 earthquake 12 km WNW of Akutan, Alaska

A magnitude 1.8 earthquake struck 12 km WNW of Akutan, Alaska on Thu, Aug 13, 2020, 9:34 PM AKDT (05:34 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M3.7 31 km E of Akutan, 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
1.8	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
1.29	ML, local (Richter)	AV	Final · ±0.386361461021066 · 6 stations

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 56 in the 60 days after this one and 35 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event ak020afi6bs2 (also filed as av91111776). Read Sat, Oct 3, 2026, 2:39 PM UTC.