M4.6 earthquake 260 km W of Adak, Alaska
A magnitude 4.6 earthquake struck 260 km W of Adak, Alaska on Wed, Oct 3, 1984, 5:43 AM GMT+12 (17:43 UTC), 175 km (109 mi) below the surface.
A larger quake followed: M4.7 178 km W 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
- 4.6 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1984-10-02 17:43:10 UTC
- Depth
- 174.8 km (108.6 mi), intermediate-depth
- Epicenter
- 52.095° N, 179.590° 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 1.6 and up: 2 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00027vf. Read Sat, Oct 3, 2026, 5:26 AM UTC.