M2.8 earthquake 211 km W of Adak, Alaska

A magnitude 2.8 earthquake struck 211 km W of Adak, Alaska on Fri, Apr 19, 2024, 11:23 AM HADT (20:23 UTC), 92 km (57 mi) below the surface.

A larger quake followed: M4.9 254 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
2.8	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.081 · 20 stations
2.4	ML, local (Richter)	Alaska Earthquake Center	Preliminary

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Within 100 km, magnitude 1.5 and up: 194 in the 60 days after this one and 60 in the 30 days before it.

The first 60 of 194.

From the USGS Earthquake Hazards Program and its partner networks, event us6000mz32 (also filed as ak0245295w3x). Read Thu, Oct 1, 2026, 1:52 PM UTC.