Alaska earthquakes

M4.7 earthquake 41 km SSW of Atka, Alaska

A magnitude 4.7 earthquake struck 41 km SSW of Atka, Alaska on Sun, Apr 27, 1997, 6:59 PM HADT (03:59 UTC), 49 km (30 mi) below the surface.

A larger quake followed: M5.3 87 km SSE of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.7 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1997-04-28 03:59:20 UTC
Depth
49.0 km (30.4 mi), shallow
Epicenter
51.838° N, 174.381° 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
CONSTRAINED_BY_DEPTH_PHASES

Nearby

Within 100 km, magnitude 1.7 and up: 6 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 5.088 km SE of Atka, Alaska · 10737 days ago · 33 km deep · 75 km away
  2. 3.467 km W of Atka, Alaska · 10736 days ago · 33 km deep · 64 km away
  3. 4.712 km ESE of Atka, Alaska · 10731 days ago · 98 km deep · 41 km away
  4. 4.194 km SE of Atka, Alaska · 10725 days ago · 33 km deep · 82 km away
  5. 3.575 km ESE of Adak, Alaska · 10705 days ago · 33 km deep · 97 km away
  6. 5.387 km SSE of Atka, Alaska · 10696 days ago · 33 km deep · 63 km away

Before

  1. 4.046 km WSW of Atka, Alaska · 10756 days ago · 33 km deep · 30 km away
  2. 4.395 km SW of Atka, Alaska · 10764 days ago · 25 km deep · 63 km away
  3. 5.753 km SE of Atka, Alaska · 10774 days ago · 33 km deep · 46 km away
  4. 4.124 km ESE of Atka, Alaska · 10778 days ago · 33 km deep · 50 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00081dr. Read Thu, Oct 1, 2026, 7:11 PM UTC.