M4.6 earthquake 69 km SW of Unalaska, Alaska
A magnitude 4.6 earthquake struck 69 km SW of Unalaska, Alaska on Tue, Apr 7, 1987, 7:56 AM AKDT (15:56 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.7 38 km ESE of Nikolski, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1987-04-07 15:56:33 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 53.491° N, 167.360° 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
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 7 in the 60 days after this one and 10 in the 30 days before it.
After
- 5.738 km ESE of Nikolski, Alaska · 14411 days ago · 33 km deep · 97 km away
- 5.168 km SW of Unalaska, Alaska · 14409 days ago · 33 km deep · 14 km away
- 4.563 km SW of Unalaska, Alaska · 14408 days ago · 33 km deep · 6 km away
- 4.476 km SW of Unalaska, Alaska · 14406 days ago · 33 km deep · 8 km away
- 3.938 km WSW of Dutch Harbor, Alaska · 14395 days ago · 33 km deep · 39 km away
- 4.731 km W of Dutch Harbor, Alaska · 14364 days ago · 33 km deep · 46 km away
- 4.641 km WSW of Unalaska, Alaska · 14361 days ago · 33 km deep · 34 km away
Before
- 4.846 km ESE of Nikolski, Alaska · 14418 days ago · 33 km deep · 95 km away
- 4.241 km SW of Unalaska, Alaska · 14420 days ago · 10 km deep · 30 km away
- 4.487 km SW of Unalaska, Alaska · 14427 days ago · 10 km deep · 30 km away
- 4.473 km WSW of Unalaska, Alaska · 14435 days ago · 10 km deep · 20 km away
- 5.474 km SW of Unalaska, Alaska · 14435 days ago · 10 km deep · 17 km away
- 4.391 km SSW of Unalaska, Alaska · 14437 days ago · 10 km deep · 43 km away
- 4.076 km SSW of Unalaska, Alaska · 14437 days ago · 10 km deep · 37 km away
- 4.685 km SSW of Unalaska, Alaska · 14438 days ago · 10 km deep · 33 km away
- 4.569 km SW of Unalaska, Alaska · 14439 days ago · 10 km deep · 16 km away
- 4.337 km SW of Unalaska, Alaska · 14442 days ago · 10 km deep · 33 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00033ze. Read Tue, Sep 22, 2026, 10:41 AM UTC.