M4.4 earthquake 282 km WSW of Adak, Alaska
A magnitude 4.4 earthquake struck 282 km WSW of Adak, Alaska on Mon, Aug 10, 1987, 6:00 PM GMT+12 (06:00 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.9 298 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
- 4.4 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1987-08-10 06:00:52 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.033° N, 179.531° 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: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.8289 km WSW of Adak, Alaska · 14296 days ago · 33 km deep · 30 km away
- 4.3248 km WSW of Adak, Alaska · 14282 days ago · 33 km deep · 58 km away
- 4.9298 km WSW of Adak, Alaska · 14261 days ago · 33 km deep · 18 km away
- 4.5285 km W of Adak, Alaska · 14244 days ago · 33 km deep · 55 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00037dp. Read Thu, Oct 1, 2026, 7:04 AM UTC.