M4.0 earthquake 182 km SSE of Adak, Alaska
A magnitude 4.0 earthquake struck 182 km SSE of Adak, Alaska on Mon, Jul 22, 1996, 9:01 AM HADT (18:01 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.2 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.
The earthquake
- Magnitude
- 4.0 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1996-07-22 18:01:41 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 50.331° N, 175.753° 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: 3 in the 60 days after this one and 6 in the 30 days before it.
After
- 4.2Andreanof Islands, Aleutian Islands, Alaska · 11024 days ago · 33 km deep · 88 km away
- 3.4198 km S of Adak, Alaska · 11021 days ago · 33 km deep · 53 km away
- 4.0190 km S of Adak, Alaska · 10996 days ago · 33 km deep · 53 km away
Before
- 3.995 km S of Adak, Alaska · 11036 days ago · 33 km deep · 99 km away
- 3.8101 km S of Adak, Alaska · 11036 days ago · 33 km deep · 89 km away
- 3.8101 km S of Adak, Alaska · 11041 days ago · 33 km deep · 98 km away
- 4.0187 km S of Adak, Alaska · 11046 days ago · 33 km deep · 73 km away
- 3.992 km S of Adak, Alaska · 11050 days ago · 33 km deep · 93 km away
- 4.3101 km S of Adak, Alaska · 11057 days ago · 33 km deep · 84 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0007meg. Read Thu, Oct 1, 2026, 6:24 PM UTC.