Alaska earthquakes

M4.5 earthquake 104 km SSW of Unalaska, Alaska

A magnitude 4.5 earthquake struck 104 km SSW of Unalaska, Alaska on Tue, Jun 12, 1979, 1:20 PM GMT-9 (22:20 UTC), 40 km (25 mi) below the surface.

A larger quake followed: M5.1 117 km E of Nikolski, 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
4.5 (mb), light
Local time
UTC
1979-06-12 22:20:25 UTC
Depth
40.0 km (24.9 mi), shallow
Epicenter
52.992° N, 167.086° 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.

Stations used
34

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 5.1117 km E of Nikolski, Alaska · 17247 days ago · 33 km deep · 18 km away
  2. 4.9126 km S of Unalaska, Alaska · 17246 days ago · 21 km deep · 31 km away
  3. 3.833 km WSW of Unalaska, Alaska · 17237 days ago · 33 km deep · 80 km away
  4. 4.1105 km S of Unalaska, Alaska · 17228 days ago · 33 km deep · 39 km away

Before

  1. 4.699 km SSW of Unalaska, Alaska · 17277 days ago · 33 km deep · 6 km away
  2. 4.4126 km E of Nikolski, Alaska · 17284 days ago · 33 km deep · 27 km away
  3. 4.7118 km ESE of Nikolski, Alaska · 17285 days ago · 33 km deep · 35 km away
  4. 4.6116 km E of Nikolski, Alaska · 17286 days ago · 33 km deep · 14 km away
  5. 4.5120 km SSW of Unalaska, Alaska · 17286 days ago · 26 km deep · 24 km away
  6. 4.6114 km SSW of Unalaska, Alaska · 17287 days ago · 33 km deep · 10 km away
  7. 4.8169 km ESE of Nikolski, Alaska · 17287 days ago · 33 km deep · 90 km away
  8. 6.2129 km ESE of Nikolski, Alaska · 17287 days ago · 23 km deep · 43 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0001182. Read Tue, Sep 22, 2026, 10:21 AM UTC.