M2.1 earthquake 169 km WSW of Adak, Alaska

A magnitude 2.1 earthquake struck 169 km WSW of Adak, Alaska on Thu, Aug 29, 2019, 12:41 PM HADT (21:41 UTC), 12 km (8 mi) below the surface.

A larger quake followed: M5.4 146 km WSW of Adak, 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
2.1	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
2.62	ML, local (Richter)	AV	Final · ±0.52 · 2 stations

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and 103 in the 30 days before it.

The first 60 of at least 201.

From the USGS Earthquake Hazards Program and its partner networks, event ak019b2x9nks (also filed as av62080936). Read Fri, Oct 2, 2026, 8:06 PM UTC.