M4.6 earthquake 44 km SSW of Adak, Alaska

A magnitude 4.6 earthquake struck 44 km SSW of Adak, Alaska on Thu, Jun 27, 1996, 8:43 AM HADT (17:43 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
4.6	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · 37 stations
4.6	mb, body-wave	Alaska Earthquake Center	Preliminary

The USGS’s account of the effects of this earthquake.

Felt (III) on Adak.

From the USGS event page for usp0007kce. U.S. Geological Survey text and figures are in the public domain.

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Within 100 km, magnitude 1.6 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 usp0007kce (also filed as ak99688bkqck). Read Thu, Oct 1, 2026, 5:52 AM UTC.