M4.3 earthquake 190 km WSW of Adak, Alaska
A magnitude 4.3 earthquake struck 190 km WSW of Adak, Alaska on Tue, Apr 14, 1987, 2:52 AM HADT (11:52 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M6.8 235 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
- 4.3 (ml), light
- Local time
- UTC
- 1987-04-14 11:52:50 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.011° N, 179.003° 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: 13 in the 60 days after this one and 2 in the 30 days before it.
After
- 6.8235 km WSW of Adak, Alaska · 14385 days ago · 20 km deep · 69 km away
- 5.3262 km WSW of Adak, Alaska · 14385 days ago · 33 km deep · 74 km away
- 5.2239 km WSW of Adak, Alaska · 14385 days ago · 33 km deep · 59 km away
- 4.9245 km WSW of Adak, Alaska · 14385 days ago · 33 km deep · 72 km away
- 5.1249 km WSW of Adak, Alaska · 14385 days ago · 33 km deep · 64 km away
- 4.4244 km WSW of Adak, Alaska · 14385 days ago · 33 km deep · 69 km away
- 4.8246 km WSW of Adak, Alaska · 14385 days ago · 33 km deep · 58 km away
- 4.8246 km WSW of Adak, Alaska · 14385 days ago · 33 km deep · 65 km away
- 4.9243 km WSW of Adak, Alaska · 14385 days ago · 33 km deep · 58 km away
- 4.8236 km WSW of Adak, Alaska · 14385 days ago · 33 km deep · 76 km away
- 5.0226 km WSW of Adak, Alaska · 14381 days ago · 33 km deep · 71 km away
- 4.8248 km WSW of Adak, Alaska · 14353 days ago · 33 km deep · 59 km away
- 4.7192 km WSW of Adak, Alaska · 14353 days ago · 33 km deep · 25 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000345q. Read Tue, Sep 22, 2026, 9:35 PM UTC.