Alaska earthquakes

M4.3 earthquake 99 km NNE of Atka, Alaska

A magnitude 4.3 earthquake struck 99 km NNE of Atka, Alaska on Tue, May 16, 2023, 8:11 AM HADT (17:11 UTC), 245 km (152 mi) below the surface.

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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
4.3 (mb), light
Local time
UTC
2023-05-16 17:11:27 UTC
Depth
244.7 km (152.1 mi), intermediate-depth
Epicenter
53.049° N, 173.763° W
Region
Alaska
Felt reports
1
Strongest shaking
I, not felt shaking
Tsunami flag
No
Status
Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated
I, not felt shaking
Peak ground acceleration
0.0% of gravity
Peak ground velocity
-4.2 cm/s
Map
Automatic
USGS ShakeMap: estimated shaking intensity around the epicenter
Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 7.5 km horizontally, 4.9 km in depth
Magnitude uncertainty
±0.04
Depth from
From location
Station coverage gap
85°
Stations used
118

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 3.925 km ENE of Atka, Alaska · 1226 days ago · 121 km deep · 89 km away
  2. 3.894 km E of Atka, Alaska · 1224 days ago · 209 km deep · 100 km away
  3. 1.617 km NNE of Atka, Alaska · 1224 days ago · 7 km deep · 83 km away
  4. 3.481 km NE of Atka, Alaska · 1218 days ago · 180 km deep · 34 km away
  5. 2.962 km NNW of Atka, Alaska · 1214 days ago · 139 km deep · 64 km away
  6. 3.717 km NW of Atka, Alaska · 1207 days ago · 115 km deep · 90 km away
  7. 2.343 km E of Atka, Alaska · 1206 days ago · 153 km deep · 97 km away
  8. 2.0142 km N of Atka, Alaska · 1202 days ago · 33 km deep · 52 km away
  9. 2.994 km NE of Atka, Alaska · 1202 days ago · 76 km deep · 35 km away
  10. 1.915 km E of Atka, Alaska · 1201 days ago · 70 km deep · 95 km away
  11. 4.233 km NNW of Atka, Alaska · 1197 days ago · 188 km deep · 80 km away
  12. 3.967 km N of Atka, Alaska · 1189 days ago · 228 km deep · 45 km away
  13. 4.1108 km NE of Atka, Alaska · 1188 days ago · 187 km deep · 62 km away
  14. 3.360 km NNW of Atka, Alaska · 1183 days ago · 163 km deep · 60 km away
  15. 2.928 km NE of Atka, Alaska · 1179 days ago · 176 km deep · 78 km away
  16. 2.865 km NW of Atka, Alaska · 1178 days ago · 219 km deep · 80 km away
  17. 2.0129 km NNW of Atka, Alaska · 1178 days ago · 11 km deep · 67 km away

Before

  1. 3.0131 km NNE of Atka, Alaska · 1240 days ago · 10 km deep · 41 km away
  2. 3.236 km NW of Atka, Alaska · 1243 days ago · 192 km deep · 82 km away
  3. 3.292 km NNE of Atka, Alaska · 1252 days ago · 11 km deep · 26 km away
  4. 3.229 km NNW of Atka, Alaska · 1253 days ago · 173 km deep · 81 km away
  5. 3.829 km E of Atka, Alaska · 1254 days ago · 96 km deep · 93 km away · felt by 1

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000kcbw (also filed as ak0236979zfl). Read Thu, Oct 1, 2026, 1:35 AM UTC.