M2.7 earthquake 125 km S of Unalaska, Alaska

A magnitude 2.7 earthquake struck 125 km S of Unalaska, Alaska on Tue, Feb 20, 2024, 5:42 AM AKST (14:42 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M4.6 87 km SSW of Unalaska, 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)	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.105 · 12 stations
2.3	ML, local (Richter)	Alaska Earthquake Center	Preliminary

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: 109 in the 60 days after this one and 45 in the 30 days before it.

The first 60 of 109.

From the USGS Earthquake Hazards Program and its partner networks, event us7000m4dq (also filed as ak0242ckzuk4). Read Sun, Oct 4, 2026, 8:14 PM UTC.