Alaska earthquakes

M1.8 earthquake 87 km W of Adak, Alaska

A magnitude 1.8 earthquake struck 87 km W of Adak, Alaska on Tue, Mar 17, 2026, 8:34 AM HADT (17:34 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M4.5 27 km S of Adak, Alaska. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 1.8 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Tue, Mar 17, 2026, 8:34 AM HADT
UTC: 2026-03-17 17:34:46 UTC
Depth: 11.7 km (7.3 mi), shallow
Epicenter: 51.847° N, 177.906° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

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
1.8	ML, local (Richter)	Alaska Earthquake Center	Preferred · Reviewed · ±0.2 · 9 stations
1.14	ML, local (Richter)	AV	Final · ±0.212775146020283 · 7 stations

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 6.8 km horizontally, 1.7 km in depth
Magnitude uncertainty: ±0.20
Station coverage gap: 123°
Stations used: 16

Nearby

Within 100 km, magnitude 1.5 and up: 159 in the 60 days after this one and 64 in the 30 days before it.

After

The first 60 of 159.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event aka2026fjakyb (also filed as av93056849). Read Thu, Oct 1, 2026, 7:32 PM UTC.