M4.1 earthquake 100 km SSW of Atka, Alaska
A magnitude 4.1 earthquake struck 100 km SSW of Atka, Alaska on Fri, Sep 20, 1996, 7:06 PM HADT (04:06 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.2 85 km E of Adak, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.1 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1996-09-21 04:06:14 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.387° N, 174.840° 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: 4 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.489 km SSE of Adak, Alaska · 10964 days ago · 33 km deep · 91 km away
- 4.887 km ESE of Adak, Alaska · 10960 days ago · 33 km deep · 53 km away
- 5.285 km E of Adak, Alaska · 10930 days ago · 33 km deep · 61 km away
- 4.5108 km SE of Adak, Alaska · 10928 days ago · 33 km deep · 35 km away
Before
- 4.694 km SW of Atka, Alaska · 10970 days ago · 51 km deep · 18 km away
- 5.288 km S of Atka, Alaska · 10975 days ago · 33 km deep · 53 km away
- 5.081 km S of Atka, Alaska · 10975 days ago · 33 km deep · 54 km away
- 4.274 km SSE of Adak, Alaska · 10981 days ago · 33 km deep · 86 km away
- 4.783 km SW of Atka, Alaska · 10995 days ago · 33 km deep · 50 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0007q8d. Read Fri, Oct 2, 2026, 4:25 AM UTC.