M4.3 earthquake 235 km WSW of Adak, Alaska

A magnitude 4.3 earthquake struck 235 km WSW of Adak, Alaska on Fri, Mar 8, 1996, 7:17 AM HAST (17:17 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M6.8 Rat 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
4.3	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · 27 stations
4.3	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: 36 in the 60 days after this one and 3 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event usp0007efz (also filed as ak99634qrp4j). Read Sun, Oct 4, 2026, 2:30 PM UTC.