Alaska earthquakes

M3.9 earthquake 18 km N of Susitna, Alaska

A magnitude 3.9 earthquake struck 18 km N of Susitna, Alaska on Wed, May 11, 1977, 8:33 AM GMT-9 (17:33 UTC), 76 km (47 mi) below the surface.

A larger quake followed: M4.1 15 km E of Susitna North, Alaska. This one was a foreshock.

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

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The earthquake

Magnitude
3.9 (mb), minor
Local time
UTC
1977-05-11 17:33:30 UTC
Depth
76.0 km (47.2 mi), intermediate-depth
Epicenter
61.704° N, 150.465° 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
23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 3.619 km WSW of Point MacKenzie, Alaska · 18009 days ago · 67 km deep · 44 km away
  2. 4.115 km E of Susitna North, Alaska · 18005 days ago · 60 km deep · 70 km away
  3. 4.311 km ESE of Susitna, Alaska · 17994 days ago · 74 km deep · 25 km away
  4. 3.18 km W of Susitna, Alaska · 17993 days ago · 52 km deep · 20 km away
  5. 4.712 km ENE of Beluga, Alaska · 17973 days ago · 72 km deep · 63 km away
  6. 3.70 km NE of Talkeetna, Alaska · 17973 days ago · 18 km deep · 72 km away

Before

  1. 4.551 km SW of Skwentna, Alaska · 18035 days ago · 130 km deep · 83 km away
  2. 3.528 km WSW of Susitna, Alaska · 18044 days ago · 73 km deep · 42 km away
  3. 3.125 km SSW of Petersville, Alaska · 18045 days ago · 38 km deep · 70 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000nue. Read Tue, Sep 22, 2026, 8:24 AM UTC.