Alaska earthquakes

M3.5 earthquake 182 km E of Atka, Alaska

A magnitude 3.5 earthquake struck 182 km E of Atka, Alaska on Sat, Oct 12, 2019, 6:12 PM HADT (03:12 UTC), 35 km (22 mi) below the surface.

A larger quake followed: M5.8 111 km SW of Nikolski, Alaska. This one was a foreshock.

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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
3.5 (ML, local (Richter)), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2019-10-13 03:12:06 UTC
Depth
35.0 km (21.7 mi), shallow
Epicenter
52.039° N, 171.547° W
Region
Alaska
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
3.5ML, local (Richter)USGS National Earthquake Information CenterPreferred · Reviewed · ±0.115 · 10 stations
3.0ML, local (Richter)Alaska Earthquake CenterPreliminary

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 4.8 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.12
Depth from
Operator assigned
Station coverage gap
208°, poorly surrounded by stations
Stations used
22

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 11 in the 30 days before it.

After

  1. 2.8165 km SW of Nikolski, Alaska · 2546 days ago · 35 km deep · 47 km away
  2. 2.5165 km SW of Nikolski, Alaska · 2546 days ago · 35 km deep · 48 km away
  3. 4.1111 km SW of Nikolski, Alaska · 2546 days ago · 49 km deep · 99 km away
  4. 3.8176 km W of Nikolski, Alaska · 2545 days ago · 114 km deep · 74 km away
  5. 2.4146 km ENE of Atka, Alaska · 2538 days ago · 87 km deep · 97 km away
  6. 5.8111 km SW of Nikolski, Alaska · 2533 days ago · 35 km deep · 99 km away · felt by 1 · tsunami flag
  7. 2.7173 km SW of Nikolski, Alaska · 2530 days ago · 35 km deep · 51 km away
  8. 3.9181 km WSW of Nikolski, Alaska · 2523 days ago · 47 km deep · 31 km away
  9. 3.7176 km ESE of Atka, Alaska · 2518 days ago · 35 km deep · 23 km away
  10. 2.3103 km ESE of Atka, Alaska · 2514 days ago · 14 km deep · 95 km away
  11. 2.8158 km E of Atka, Alaska · 2513 days ago · 33 km deep · 34 km away
  12. 3.7150 km SW of Nikolski, Alaska · 2505 days ago · 35 km deep · 73 km away
  13. 2.7134 km E of Atka, Alaska · 2491 days ago · 28 km deep · 49 km away
  14. 3.8160 km WSW of Nikolski, Alaska · 2489 days ago · 36 km deep · 48 km away

Before

  1. 2.9140 km SW of Nikolski, Alaska · 2549 days ago · 35 km deep · 92 km away
  2. 2.2117 km ESE of Atka, Alaska · 2552 days ago · 8 km deep · 87 km away
  3. 3.0159 km SW of Nikolski, Alaska · 2553 days ago · 10 km deep · 83 km away
  4. 2.8171 km E of Atka, Alaska · 2554 days ago · 26 km deep · 16 km away
  5. 2.8107 km ESE of Atka, Alaska · 2554 days ago · 19 km deep · 88 km away
  6. 2.6161 km SW of Nikolski, Alaska · 2555 days ago · 35 km deep · 54 km away
  7. 3.7126 km WSW of Nikolski, Alaska · 2555 days ago · 49 km deep · 82 km away
  8. 4.0148 km SW of Nikolski, Alaska · 2562 days ago · 27 km deep · 64 km away
  9. 2.1134 km E of Atka, Alaska · 2565 days ago · 52 km deep · 51 km away
  10. 3.0174 km ESE of Atka, Alaska · 2568 days ago · 35 km deep · 45 km away
  11. 3.9133 km WSW of Nikolski, Alaska · 2570 days ago · 46 km deep · 75 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70005ty1 (also filed as ak019d51k521). Read Fri, Oct 2, 2026, 7:43 AM UTC.