Alaska earthquakes

M4.5 earthquake 63 km SW of Unalaska, Alaska

A magnitude 4.5 earthquake struck 63 km SW of Unalaska, Alaska on Fri, Jul 18, 1986, 11:16 PM AKDT (07:16 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M6.0 64 km SW of Unalaska, Alaska. This one was a foreshock.

Unalaska forecastMore in Alaska

Map

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

Open the live map with earthquakes

The earthquake

Magnitude
4.5 (mb), light
Local time
UTC
1986-07-19 07:16:10 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
53.403° N, 167.087° 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: 20 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 4.862 km SW of Unalaska, Alaska · 14682 days ago · 33 km deep · 15 km away
  2. 4.257 km SW of Unalaska, Alaska · 14682 days ago · 33 km deep · 15 km away
  3. 5.064 km WSW of Unalaska, Alaska · 14682 days ago · 33 km deep · 32 km away
  4. 4.463 km SW of Unalaska, Alaska · 14682 days ago · 33 km deep · 15 km away
  5. 4.948 km WSW of Unalaska, Alaska · 14682 days ago · 33 km deep · 30 km away
  6. 6.064 km SW of Unalaska, Alaska · 14681 days ago · 33 km deep · 19 km away
  7. 5.1Fox Islands, Aleutian Islands, Alaska · 14681 days ago · 33 km deep · 22 km away
  8. 4.463 km SW of Unalaska, Alaska · 14681 days ago · 33 km deep · 6 km away
  9. 4.350 km SSW of Unalaska, Alaska · 14681 days ago · 33 km deep · 14 km away
  10. 4.586 km ENE of Nikolski, Alaska · 14679 days ago · 33 km deep · 44 km away
  11. 4.3Fox Islands, Aleutian Islands, Alaska · 14677 days ago · 33 km deep · 43 km away
  12. 4.779 km SSW of Unalaska, Alaska · 14675 days ago · 33 km deep · 15 km away
  13. 5.0112 km S of Unalaska, Alaska · 14673 days ago · 33 km deep · 69 km away
  14. 4.763 km SW of Unalaska, Alaska · 14670 days ago · 33 km deep · 7 km away
  15. 4.662 km SW of Unalaska, Alaska · 14669 days ago · 33 km deep · 14 km away
  16. 4.347 km ESE of Nikolski, Alaska · 14668 days ago · 33 km deep · 100 km away
  17. 4.6105 km S of Unalaska, Alaska · 14665 days ago · 33 km deep · 58 km away
  18. 4.560 km WSW of Unalaska, Alaska · 14662 days ago · 33 km deep · 26 km away
  19. 4.857 km SE of Unalaska, Alaska · 14647 days ago · 33 km deep · 83 km away
  20. 4.560 km SW of Unalaska, Alaska · 14636 days ago · 33 km deep · 8 km away

Before

  1. 6.051 km SW of Unalaska, Alaska · 14682 days ago · 33 km deep · 23 km away
  2. 5.274 km SE of Unalaska, Alaska · 14682 days ago · 33 km deep · 82 km away
  3. 5.672 km SE of Unalaska, Alaska · 14682 days ago · 33 km deep · 80 km away
  4. 4.458 km WSW of Unalaska, Alaska · 14682 days ago · 33 km deep · 26 km away
  5. 4.657 km WSW of Unalaska, Alaska · 14682 days ago · 33 km deep · 25 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002w5s. Read Tue, Sep 29, 2026, 9:23 AM UTC.