M4.2 earthquake 88 km SSW of Adak, Alaska

A magnitude 4.2 earthquake struck 88 km SSW of Adak, Alaska on Tue, Jun 25, 1996, 2:30 AM HADT (11:30 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.

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
4.2	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · 33 stations
4.2	mb, body-wave	Alaska Earthquake Center	Preliminary

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Within 100 km, magnitude 1.5 and up: 39 in the 60 days after this one and at least 200 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event usp0007k8j (also filed as ak99684wup0x). Read Sun, Oct 4, 2026, 5:12 PM UTC.