M4.5 earthquake 69 km SW of Unalaska, Alaska
A magnitude 4.5 earthquake struck 69 km SW of Unalaska, Alaska on Thu, Mar 12, 1987, 4:21 AM AKST (13:21 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.6 85 km SSW 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
- 1987-03-12 13:21:28 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 53.385° N, 167.186° 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: 14 in the 60 days after this one and 30 in the 30 days before it.
After
- 4.685 km SSW of Unalaska, Alaska · 14438 days ago · 10 km deep · 19 km away
- 4.076 km SSW of Unalaska, Alaska · 14437 days ago · 10 km deep · 20 km away
- 4.391 km SSW of Unalaska, Alaska · 14437 days ago · 10 km deep · 29 km away
- 5.474 km SW of Unalaska, Alaska · 14435 days ago · 10 km deep · 5 km away
- 4.473 km WSW of Unalaska, Alaska · 14435 days ago · 10 km deep · 37 km away
- 4.487 km SW of Unalaska, Alaska · 14427 days ago · 10 km deep · 19 km away
- 4.241 km SW of Unalaska, Alaska · 14420 days ago · 10 km deep · 28 km away
- 4.846 km ESE of Nikolski, Alaska · 14418 days ago · 33 km deep · 94 km away
- 4.669 km SW of Unalaska, Alaska · 14413 days ago · 33 km deep · 16 km away
- 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 · 3 km away
- 4.563 km SW of Unalaska, Alaska · 14408 days ago · 33 km deep · 19 km away
- 4.476 km SW of Unalaska, Alaska · 14406 days ago · 33 km deep · 17 km away
- 3.938 km WSW of Dutch Harbor, Alaska · 14395 days ago · 33 km deep · 47 km away
Before
- 4.337 km SW of Unalaska, Alaska · 14442 days ago · 10 km deep · 33 km away
- 4.452 km SW of Unalaska, Alaska · 14443 days ago · 10 km deep · 21 km away
- 4.146 km WSW of Unalaska, Alaska · 14443 days ago · 10 km deep · 37 km away
- 4.456 km SW of Unalaska, Alaska · 14443 days ago · 10 km deep · 13 km away
- 4.270 km SSW of Unalaska, Alaska · 14444 days ago · 10 km deep · 27 km away
- 4.030 km WSW of Unalaska, Alaska · 14445 days ago · 10 km deep · 42 km away
- 4.583 km SSW of Unalaska, Alaska · 14445 days ago · 10 km deep · 19 km away
- 4.690 km SSW of Unalaska, Alaska · 14446 days ago · 10 km deep · 26 km away
- 4.680 km SSW of Unalaska, Alaska · 14446 days ago · 10 km deep · 16 km away
- 4.231 km WSW of Unalaska, Alaska · 14447 days ago · 10 km deep · 43 km away
- 4.387 km SSW of Unalaska, Alaska · 14448 days ago · 10 km deep · 24 km away
- 4.680 km SW of Unalaska, Alaska · 14448 days ago · 10 km deep · 12 km away
- 4.785 km SW of Unalaska, Alaska · 14448 days ago · 10 km deep · 17 km away
- 4.884 km SW of Unalaska, Alaska · 14448 days ago · 10 km deep · 23 km away
- 4.581 km WSW of Unalaska, Alaska · 14450 days ago · 10 km deep · 32 km away
- 4.552 km SW of Unalaska, Alaska · 14450 days ago · 10 km deep · 25 km away
- 4.591 km ENE of Nikolski, Alaska · 14451 days ago · 10 km deep · 37 km away
- 4.636 km SW of Unalaska, Alaska · 14451 days ago · 10 km deep · 33 km away
- 4.790 km SSW of Unalaska, Alaska · 14451 days ago · 10 km deep · 25 km away
- 4.552 km WSW of Dutch Harbor, Alaska · 14451 days ago · 10 km deep · 42 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0003381. Read Tue, Sep 22, 2026, 10:41 AM UTC.