Alaska earthquakes

M4.2 earthquake 138 km WSW of Adak, Alaska

A magnitude 4.2 earthquake struck 138 km WSW of Adak, Alaska on Mon, Aug 12, 1996, 10:13 AM HADT (19:13 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M6.0 Andreanof Islands, Aleutian Islands, Alaska. This one was a foreshock.

Map

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

Open the live map with earthquakes

The earthquake

Magnitude: 4.2 (mb), light
Local time: Mon, Aug 12, 1996, 10:13 AM HADT
UTC: 1996-08-12 19:13:59 UTC
Depth: 33.0 km (20.5 mi), shallow
Epicenter: 51.243° N, 178.357° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Depth from: OPERATOR_ASSIGNED

Nearby

Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 14 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0007nfs (also filed as ak996acfb8iy). Read Tue, Sep 22, 2026, 8:49 PM UTC.