M4.4 earthquake 63 km E of Adak, Alaska
A magnitude 4.4 earthquake struck 63 km E of Adak, Alaska on Thu, Apr 16, 1987, 3:58 PM HADT (00:58 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.0 61 km SE 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
- 1987-04-17 00:58:45 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.827° N, 175.720° 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 1.5 and up: 11 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.760 km SE of Adak, Alaska · 14385 days ago · 33 km deep · 52 km away
- 5.061 km SE of Adak, Alaska · 14383 days ago · 33 km deep · 36 km away
- 4.774 km SSE of Adak, Alaska · 14376 days ago · 33 km deep · 63 km away
- 4.581 km SSE of Adak, Alaska · 14375 days ago · 33 km deep · 71 km away
- 4.397 km ESE of Adak, Alaska · 14373 days ago · 33 km deep · 41 km away
- 3.697 km SSE of Adak, Alaska · 14372 days ago · 33 km deep · 88 km away
- 5.036 km SE of Adak, Alaska · 14367 days ago · 58 km deep · 40 km away
- 4.879 km S of Atka, Alaska · 14362 days ago · 33 km deep · 97 km away
- 5.095 km SSW of Atka, Alaska · 14362 days ago · 33 km deep · 99 km away
- 4.975 km SW of Atka, Alaska · 14360 days ago · 33 km deep · 62 km away
- 4.386 km SSE of Adak, Alaska · 14353 days ago · 33 km deep · 77 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000347n. Read Thu, Oct 1, 2026, 7:03 AM UTC.