M3.9 earthquake 161 km WSW of Adak, Alaska
A magnitude 3.9 earthquake struck 161 km WSW of Adak, Alaska on Thu, Apr 4, 1996, 12:45 PM HAST (22:45 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.5 132 km WSW 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
- 3.9 (mb, body-wave), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1996-04-04 22:45:26 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.427° N, 178.854° 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: 8 in the 60 days after this one and 2 in the 30 days before it.
After
- 5.5132 km WSW of Adak, Alaska · 11123 days ago · 28 km deep · 30 km away
- 5.5126 km WSW of Adak, Alaska · 11121 days ago · 29 km deep · 35 km away
- 3.8233 km WSW of Adak, Alaska · 11110 days ago · 60 km deep · 71 km away
- 3.7226 km WSW of Adak, Alaska · 11110 days ago · 66 km deep · 65 km away
- 4.0228 km WSW of Adak, Alaska · 11110 days ago · 64 km deep · 67 km away
- 4.7120 km WSW of Adak, Alaska · 11107 days ago · 33 km deep · 41 km away
- 4.4141 km WNW of Adak, Alaska · 11094 days ago · 142 km deep · 85 km away
- 4.2188 km WSW of Adak, Alaska · 11093 days ago · 33 km deep · 27 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0007fs6. Read Sun, Oct 4, 2026, 1:35 PM UTC.