M4.7 earthquake 142 km WSW of Adak, Alaska
A magnitude 4.7 earthquake struck 142 km WSW of Adak, Alaska on Wed, Jul 30, 1980, 6:43 PM GMT-10 (04:43 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.0 114 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
- 4.7 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1980-07-31 04:43:55 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.194° N, 178.371° 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
- Stations used
- 18
Nearby
Within 100 km, magnitude 1.7 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.6140 km WSW of Adak, Alaska · 16826 days ago · 55 km deep · 30 km away
- 5.0114 km WSW of Adak, Alaska · 16813 days ago · 54 km deep · 44 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000196a. Read Thu, Oct 1, 2026, 10:53 AM UTC.