Alaska earthquakes

M4.6 earthquake 188 km SSE of Atka, Alaska

A magnitude 4.6 earthquake struck 188 km SSE of Atka, Alaska on Sun, Apr 12, 2026, 11:41 AM HADT (20:41 UTC), 10 km (6 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
4.6 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2026-04-12 20:41:16 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
50.726° N, 172.842° W
Region
Alaska
Strongest shaking
II, weak 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
4.6mb, body-waveUSGS National Earthquake Information CenterPreferred · Reviewed · ±0.037 · 215 stations
4.4ML, local (Richter)Alaska Earthquake CenterReviewed · ±0.3 · 59 stations

Shaking

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

Strongest estimated
II, weak shaking
Peak ground acceleration
0.2% of gravity
Peak ground velocity
0.1 cm/s
Map
Automatic
USGS ShakeMap: estimated shaking intensity around the epicenter
Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 6.9 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.04
Depth from
Operator assigned
Station coverage gap
150°
Stations used
82

Nearby

Within 100 km, magnitude 1.6 and up: 13 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 3.3170 km S of Atka, Alaska · 158 days ago · 10 km deep · 93 km away
  2. 3.0202 km SSE of Atka, Alaska · 152 days ago · 10 km deep · 63 km away
  3. 3.3201 km SSE of Atka, Alaska · 147 days ago · 10 km deep · 20 km away
  4. 3.2196 km SSE of Atka, Alaska · 145 days ago · 10 km deep · 13 km away
  5. 2.692 km SSE of Atka, Alaska · 144 days ago · 8 km deep · 96 km away
  6. 3.598 km SE of Atka, Alaska · 143 days ago · 10 km deep · 92 km away
  7. 3.2194 km SSE of Atka, Alaska · 140 days ago · 10 km deep · 13 km away
  8. 2.8140 km SSE of Atka, Alaska · 132 days ago · 10 km deep · 66 km away
  9. 2.9142 km SSE of Atka, Alaska · 122 days ago · 10 km deep · 47 km away
  10. 2.9167 km S of Atka, Alaska · 121 days ago · 10 km deep · 94 km away
  11. 2.7178 km SSE of Atka, Alaska · 117 days ago · 10 km deep · 50 km away
  12. 2.7171 km S of Atka, Alaska · 114 days ago · 10 km deep · 86 km away
  13. 2.3164 km SSE of Atka, Alaska · 112 days ago · 20 km deep · 36 km away

Before

  1. 3.6123 km SE of Atka, Alaska · 182 days ago · 35 km deep · 88 km away
  2. 2.8203 km S of Atka, Alaska · 184 days ago · 20 km deep · 88 km away
  3. 3.1194 km SSE of Atka, Alaska · 185 days ago · 10 km deep · 56 km away
  4. 2.8116 km SE of Atka, Alaska · 186 days ago · 35 km deep · 81 km away
  5. 3.8187 km SSE of Atka, Alaska · 195 days ago · 11 km deep · 9 km away
  6. 3.0195 km S of Atka, Alaska · 198 days ago · 20 km deep · 74 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000spjf (also filed as aka2026hezmlm). Read Thu, Oct 1, 2026, 9:10 AM UTC.