Alaska earthquakes

M4.1 earthquake 202 km SE of Chignik, Alaska

A magnitude 4.1 earthquake struck 202 km SE of Chignik, Alaska on Sat, Jul 22, 2023, 5:14 PM AKDT (01:14 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.7 south of Alaska. This one was a foreshock.

Sand Point forecastMore in Alaska

Map

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

Open the live map with earthquakes

The earthquake

Magnitude
4.1 (ML, local (Richter)), light
Magnitude from
Alaska Earthquake Center
Local time
UTC
2023-07-23 01:14:12 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
55.111° N, 155.955° W
Region
Alaska
Felt reports
1
Strongest shaking
I, not felt shaking
Tsunami flag
No
Status
Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.ScaleComputed byNotes
4.1ML, local (Richter)Alaska Earthquake CenterPreferred · Preliminary
4.6mb, body-waveUSGS National Earthquake Information CenterReviewed · ±0.06 · 84 stations

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
-3.7 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 I, not felt 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.

Stations used
136

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 15 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 2.6176 km ESE of Chignik, Alaska · 1165 days ago · 7 km deep · 49 km away
  2. 2.8221 km SE of Chignik, Alaska · 1165 days ago · 11 km deep · 19 km away
  3. 2.2142 km SE of Perryville, Alaska · 1163 days ago · 34 km deep · 86 km away
  4. 2.9167 km SSE of Chignik, Alaska · 1154 days ago · 24 km deep · 61 km away
  5. 3.0south of Alaska · 1153 days ago · 19 km deep · 49 km away
  6. 3.0170 km SE of Chignik, Alaska · 1146 days ago · 27 km deep · 37 km away
  7. 1.9125 km SE of Chignik, Alaska · 1143 days ago · 17 km deep · 82 km away
  8. 2.5197 km SE of Perryville, Alaska · 1138 days ago · 23 km deep · 82 km away
  9. 2.6165 km SE of Chignik, Alaska · 1135 days ago · 3 km deep · 46 km away
  10. 2.6154 km SSW of Akhiok, Alaska · 1130 days ago · 14 km deep · 83 km away
  11. 4.7south of Alaska · 1115 days ago · 5 km deep · 31 km away
  12. 2.8209 km SE of Chignik, Alaska · 1115 days ago · 4 km deep · 38 km away
  13. 3.4194 km SE of Chignik, Alaska · 1115 days ago · 0 km deep · 30 km away · felt by 1
  14. 2.0155 km ESE of Chignik, Alaska · 1112 days ago · 10 km deep · 85 km away
  15. 2.7south of Alaska · 1108 days ago · 4 km deep · 85 km away

Before

  1. 3.5205 km SE of Perryville, Alaska · 1170 days ago · 12 km deep · 78 km away
  2. 2.2112 km SE of Chignik, Alaska · 1172 days ago · 6 km deep · 90 km away
  3. 2.6149 km SE of Perryville, Alaska · 1173 days ago · 15 km deep · 96 km away
  4. 2.6Alaska Peninsula · 1181 days ago · 14 km deep · 83 km away
  5. 3.4198 km SE of Perryville, Alaska · 1189 days ago · 7 km deep · 77 km away
  6. 2.6150 km SE of Chignik, Alaska · 1193 days ago · 4 km deep · 55 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0239deb91c (also filed as us7000khqe, ak0239debcf6). Read Thu, Oct 1, 2026, 8:05 AM UTC.