M4.7 earthquake 178 km W of Adak, Alaska
A magnitude 4.7 earthquake struck 178 km W of Adak, Alaska on Wed, Oct 17, 1984, 8:57 AM HADT (17:57 UTC), 33 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1984-10-17 17:57:27 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.653° N, 179.195° 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 1.7 and up: 0 in the 60 days after this one and 3 in the 30 days before it.
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002886. Read Thu, Oct 1, 2026, 11:45 PM UTC.