Alaska earthquakes

M5.7 earthquake 101 km SSE of Chiniak, Alaska

A magnitude 5.7 earthquake struck 101 km SSE of Chiniak, Alaska on Wed, Jul 19, 1978, 12:32 AM GMT-9 (09:32 UTC), 33 km (21 mi) below the surface.

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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
5.7 (mb), moderate
Local time
UTC
1978-07-19 09:32:08 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
56.769° N, 151.647° 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
Stations used
296

Nearest places

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

Nearby

Within 100 km, magnitude 2.5 and up: 2 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 3.031 km E of Old Harbor, Alaska · 17597 days ago · 33 km deep · 82 km away
  2. 4.693 km SSE of Old Harbor, Alaska · 17567 days ago · 26 km deep · 72 km away

Before

  1. 4.228 km ENE of Old Harbor, Alaska · 17626 days ago · 83 km deep · 93 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000vmy (also filed as gcmtb071978a, ushis3480, gcmt19780719093208, iscgem679553). Read Wed, Sep 23, 2026, 1:00 AM UTC.