M4.8 earthquake 266 km W of Adak, Alaska
A magnitude 4.8 earthquake struck 266 km W of Adak, Alaska on Tue, Jul 31, 1984, 9:14 AM GMT+12 (21:14 UTC), 143 km (89 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.8 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1984-07-30 21:14:28 UTC
- Depth
- 142.9 km (88.8 mi), intermediate-depth
- Epicenter
- 52.082° N, 179.496° 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 1.8 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002646. Read Sun, Oct 4, 2026, 6:39 PM UTC.