Alaska earthquakes

M2.5 earthquake 82 km WNW of Adak, Alaska

A magnitude 2.5 earthquake struck 82 km WNW of Adak, Alaska on Tue, Oct 29, 2019, 4:49 PM HADT (01:49 UTC), 121 km (75 mi) below the surface.

A larger quake followed: M6.0 127 km SW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.5 (ML, local (Richter)), micro
Magnitude from: USGS National Earthquake Information Center
Local time: Tue, Oct 29, 2019, 4:49 PM HADT
UTC: 2019-10-30 01:49:28 UTC
Depth: 120.6 km (74.9 mi), intermediate-depth
Epicenter: 52.062° N, 177.792° 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
2.5	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed
2.5	ML, local (Richter)	Alaska Earthquake Center	Preliminary

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 11.6 km horizontally, 11.1 km in depth
Depth from: From location
Station coverage gap: 173°
Stations used: 43

Nearby

Within 100 km, magnitude 1.5 and up: 112 in the 60 days after this one and 70 in the 30 days before it.

After

The first 60 of 112.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70006a11 (also filed as ak019dx4q5jz). Read Thu, Oct 1, 2026, 10:06 PM UTC.