M2.7 earthquake 46 km SSW of Tanana, Alaska

A magnitude 2.7 earthquake struck 46 km SSW of Tanana, Alaska on Tue, Mar 9, 2021, 11:55 AM AKST (20:55 UTC), 18 km (11 mi) below the surface.

A larger quake followed: M4.3 40 km SSW of Tanana, 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
3.0	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.026 · 196 stations

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

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 9 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event ak02134ss9sx (also filed as us7000dhi9). Read Thu, Oct 1, 2026, 3:39 AM UTC.