M4.3 earthquake 267 km WSW of Adak, Alaska
A magnitude 4.3 earthquake struck 267 km WSW of Adak, Alaska on Sun, Apr 8, 1984, 12:41 PM GMT+12 (00:41 UTC), 92 km (57 mi) below the surface.
A larger quake followed: M4.9 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.
The earthquake
- Magnitude
- 4.3 (mb), light
- Local time
- UTC
- 1984-04-08 00:41:24 UTC
- Depth
- 92.3 km (57.4 mi), intermediate-depth
- Epicenter
- 51.358° N, 179.596° E
- Region
- Alaska
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.9Rat Islands, Aleutian Islands, Alaska · 15455 days ago · 48 km deep · 64 km away
- 5.0Rat Islands, Aleutian Islands, Alaska · 15455 days ago · 40 km deep · 65 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00023b6. Read Tue, Sep 22, 2026, 10:58 AM UTC.