M4.5 earthquake 52 km SW of Unalaska, Alaska
A magnitude 4.5 earthquake struck 52 km SW of Unalaska, Alaska on Sat, Feb 28, 1987, 11:49 PM AKST (08:49 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.8 84 km SW of Unalaska, 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
- 1987-03-01 08:49:43 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 53.606° N, 167.180° 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 1.5 and up: 28 in the 60 days after this one and 14 in the 30 days before it.
After
- 4.581 km WSW of Unalaska, Alaska · 14451 days ago · 10 km deep · 30 km away
- 4.884 km SW of Unalaska, Alaska · 14449 days ago · 10 km deep · 33 km away
- 4.785 km SW of Unalaska, Alaska · 14449 days ago · 10 km deep · 36 km away
- 4.680 km SW of Unalaska, Alaska · 14449 days ago · 10 km deep · 31 km away
- 4.387 km SSW of Unalaska, Alaska · 14448 days ago · 10 km deep · 49 km away
- 4.231 km WSW of Unalaska, Alaska · 14448 days ago · 10 km deep · 21 km away
- 4.680 km SSW of Unalaska, Alaska · 14446 days ago · 10 km deep · 40 km away
- 4.690 km SSW of Unalaska, Alaska · 14446 days ago · 10 km deep · 51 km away
- 4.583 km SSW of Unalaska, Alaska · 14445 days ago · 10 km deep · 43 km away
- 4.030 km WSW of Unalaska, Alaska · 14445 days ago · 10 km deep · 21 km away
- 4.270 km SSW of Unalaska, Alaska · 14445 days ago · 10 km deep · 44 km away
- 4.456 km SW of Unalaska, Alaska · 14444 days ago · 10 km deep · 17 km away
- 4.146 km WSW of Unalaska, Alaska · 14444 days ago · 10 km deep · 12 km away
- 4.452 km SW of Unalaska, Alaska · 14444 days ago · 10 km deep · 4 km away
- 4.337 km SW of Unalaska, Alaska · 14442 days ago · 10 km deep · 17 km away
- 4.569 km SW of Unalaska, Alaska · 14439 days ago · 10 km deep · 25 km away
- 4.685 km SSW of Unalaska, Alaska · 14438 days ago · 10 km deep · 44 km away
- 4.076 km SSW of Unalaska, Alaska · 14437 days ago · 10 km deep · 42 km away
- 4.391 km SSW of Unalaska, Alaska · 14437 days ago · 10 km deep · 53 km away
- 5.474 km SW of Unalaska, Alaska · 14435 days ago · 10 km deep · 28 km away
- 4.473 km WSW of Unalaska, Alaska · 14435 days ago · 10 km deep · 26 km away
- 4.487 km SW of Unalaska, Alaska · 14427 days ago · 10 km deep · 43 km away
- 4.241 km SW of Unalaska, Alaska · 14420 days ago · 10 km deep · 16 km away
- 4.669 km SW of Unalaska, Alaska · 14413 days ago · 33 km deep · 17 km away
- 5.168 km SW of Unalaska, Alaska · 14409 days ago · 33 km deep · 22 km away
- 4.563 km SW of Unalaska, Alaska · 14409 days ago · 33 km deep · 11 km away
- 4.476 km SW of Unalaska, Alaska · 14407 days ago · 33 km deep · 25 km away
- 3.938 km WSW of Dutch Harbor, Alaska · 14396 days ago · 33 km deep · 23 km away
Before
- 4.591 km ENE of Nikolski, Alaska · 14451 days ago · 10 km deep · 59 km away
- 4.636 km SW of Unalaska, Alaska · 14452 days ago · 10 km deep · 22 km away
- 4.790 km SSW of Unalaska, Alaska · 14452 days ago · 10 km deep · 50 km away
- 4.552 km WSW of Dutch Harbor, Alaska · 14452 days ago · 10 km deep · 18 km away
- 4.476 km SSW of Unalaska, Alaska · 14452 days ago · 10 km deep · 36 km away
- 4.558 km SW of Unalaska, Alaska · 14452 days ago · 10 km deep · 7 km away
- 4.564 km SW of Unalaska, Alaska · 14452 days ago · 10 km deep · 16 km away
- 4.484 km SSW of Unalaska, Alaska · 14452 days ago · 10 km deep · 45 km away
- 4.671 km SW of Unalaska, Alaska · 14452 days ago · 10 km deep · 26 km away
- 4.345 km SW of Unalaska, Alaska · 14452 days ago · 10 km deep · 7 km away
- 4.664 km SW of Unalaska, Alaska · 14452 days ago · 10 km deep · 13 km away
- 4.595 km SW of Unalaska, Alaska · 14453 days ago · 10 km deep · 49 km away
- 4.772 km WSW of Unalaska, Alaska · 14453 days ago · 10 km deep · 21 km away
- 6.967 km SW of Unalaska, Alaska · 14453 days ago · 10 km deep · 17 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00032wf. Read Tue, Sep 22, 2026, 8:58 PM UTC.