M4.5 earthquake 299 km WSW of Adak, Alaska
A magnitude 4.5 earthquake struck 299 km WSW of Adak, Alaska on Sat, Mar 7, 1987, 2:09 AM GMT+12 (14:09 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.1 278 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
- 4.5 (mb), light
- Local time
- UTC
- 1987-03-06 14:09:16 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.090° N, 179.235° 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.
How well it is located
Reviewed by a seismologist.
- Depth from
- OPERATOR_ASSIGNED
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.4279 km WSW of Adak, Alaska · 14451 days ago · 33 km deep · 28 km away
- 4.8280 km WSW of Adak, Alaska · 14451 days ago · 33 km deep · 27 km away
- 5.1278 km WSW of Adak, Alaska · 14451 days ago · 33 km deep · 23 km away
- 4.6Rat Islands, Aleutian Islands, Alaska · 14445 days ago · 33 km deep · 13 km away
- 4.7242 km WSW of Adak, Alaska · 14418 days ago · 33 km deep · 59 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000331h. Read Mon, Sep 28, 2026, 1:33 PM UTC.