M2.7 earthquake 71 km NW of Ambler, Alaska

A magnitude 2.7 earthquake struck 71 km NW of Ambler, Alaska on Tue, May 4, 2021, 1:13 AM AKDT (09:13 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M3.5 75 km NW of Ambler, 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
2.7	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.042 · 73 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: 15 in the 60 days after this one and 4 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event ak0215p82rcf (also filed as us7000dzyt). Read Sat, Oct 3, 2026, 8:19 AM UTC.