Alaska earthquakes

M4.4 earthquake 73 km WSW of Unalaska, Alaska

A magnitude 4.4 earthquake struck 73 km WSW of Unalaska, Alaska on Mon, Mar 16, 1987, 8:59 AM AKST (17:59 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.6 69 km SW of Unalaska, Alaska. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
4.4 (mb), light
Local time
UTC
1987-03-16 17:59:24 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
53.627° N, 167.566° 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: 7 in the 60 days after this one and 35 in the 30 days before it.

After

  1. 4.487 km SW of Unalaska, Alaska · 14428 days ago · 10 km deep · 49 km away
  2. 4.241 km SW of Unalaska, Alaska · 14421 days ago · 10 km deep · 41 km away
  3. 4.669 km SW of Unalaska, Alaska · 14414 days ago · 33 km deep · 20 km away
  4. 5.168 km SW of Unalaska, Alaska · 14409 days ago · 33 km deep · 34 km away
  5. 4.563 km SW of Unalaska, Alaska · 14409 days ago · 33 km deep · 20 km away
  6. 4.476 km SW of Unalaska, Alaska · 14407 days ago · 33 km deep · 23 km away
  7. 3.938 km WSW of Dutch Harbor, Alaska · 14396 days ago · 33 km deep · 36 km away

Before

  1. 5.474 km SW of Unalaska, Alaska · 14435 days ago · 10 km deep · 37 km away
  2. 4.391 km SSW of Unalaska, Alaska · 14437 days ago · 10 km deep · 63 km away
  3. 4.076 km SSW of Unalaska, Alaska · 14438 days ago · 10 km deep · 57 km away
  4. 4.685 km SSW of Unalaska, Alaska · 14438 days ago · 10 km deep · 52 km away
  5. 4.569 km SW of Unalaska, Alaska · 14440 days ago · 10 km deep · 37 km away
  6. 4.337 km SW of Unalaska, Alaska · 14442 days ago · 10 km deep · 42 km away
  7. 4.452 km SW of Unalaska, Alaska · 14444 days ago · 10 km deep · 28 km away
  8. 4.146 km WSW of Unalaska, Alaska · 14444 days ago · 10 km deep · 26 km away
  9. 4.456 km SW of Unalaska, Alaska · 14444 days ago · 10 km deep · 38 km away
  10. 4.270 km SSW of Unalaska, Alaska · 14445 days ago · 10 km deep · 63 km away
  11. 4.030 km WSW of Unalaska, Alaska · 14445 days ago · 10 km deep · 43 km away
  12. 4.583 km SSW of Unalaska, Alaska · 14445 days ago · 10 km deep · 53 km away
  13. 4.690 km SSW of Unalaska, Alaska · 14446 days ago · 10 km deep · 60 km away
  14. 4.680 km SSW of Unalaska, Alaska · 14446 days ago · 10 km deep · 51 km away
  15. 4.231 km WSW of Unalaska, Alaska · 14448 days ago · 10 km deep · 42 km away
  16. 4.387 km SSW of Unalaska, Alaska · 14448 days ago · 10 km deep · 59 km away
  17. 4.680 km SW of Unalaska, Alaska · 14449 days ago · 10 km deep · 34 km away
  18. 4.785 km SW of Unalaska, Alaska · 14449 days ago · 10 km deep · 36 km away
  19. 4.884 km SW of Unalaska, Alaska · 14449 days ago · 10 km deep · 25 km away
  20. 4.581 km WSW of Unalaska, Alaska · 14451 days ago · 10 km deep · 12 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00033cc. Read Wed, Sep 23, 2026, 3:32 AM UTC.