Alaska earthquakes

M4.1 earthquake 217 km ESE of Atka, Alaska

A magnitude 4.1 earthquake struck 217 km ESE of Atka, Alaska on Fri, Feb 7, 2020, 8:30 AM HAST (18:30 UTC), 17 km (11 mi) below the surface.

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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
4.1 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2020-02-07 18:30:15 UTC
Depth
17.4 km (10.8 mi), shallow
Epicenter
51.600° N, 171.195° 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
4.1mb, body-waveUSGS National Earthquake Information CenterPreferred · Reviewed · ±0.057 · 82 stations
3.7ML, 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 4.6 km horizontally, 3.7 km in depth
Magnitude uncertainty
±0.06
Depth from
From location
Station coverage gap
140°
Stations used
121

Nearby

Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 2.9171 km ESE of Atka, Alaska · 2428 days ago · 10 km deep · 49 km away
  2. 2.3124 km SW of Nikolski, Alaska · 2404 days ago · 47 km deep · 94 km away
  3. 3.2134 km SW of Nikolski, Alaska · 2401 days ago · 35 km deep · 84 km away
  4. 3.1131 km SW of Nikolski, Alaska · 2401 days ago · 35 km deep · 86 km away
  5. 3.5185 km ESE of Atka, Alaska · 2401 days ago · 35 km deep · 36 km away
  6. 2.8183 km E of Atka, Alaska · 2397 days ago · 26 km deep · 46 km away
  7. 3.1192 km SW of Nikolski, Alaska · 2380 days ago · 22 km deep · 32 km away
  8. 2.8130 km ESE of Atka, Alaska · 2378 days ago · 35 km deep · 87 km away
  9. 3.6176 km WSW of Nikolski, Alaska · 2376 days ago · 22 km deep · 55 km away
  10. 3.6134 km SW of Nikolski, Alaska · 2375 days ago · 35 km deep · 86 km away

Before

  1. 3.5195 km E of Atka, Alaska · 2433 days ago · 35 km deep · 40 km away
  2. 3.5187 km ESE of Atka, Alaska · 2443 days ago · 36 km deep · 30 km away
  3. 2.9169 km SW of Nikolski, Alaska · 2448 days ago · 26 km deep · 58 km away
  4. 3.6130 km E of Atka, Alaska · 2450 days ago · 30 km deep · 91 km away
  5. 4.0258 km SSW of Nikolski, Alaska · 2450 days ago · 10 km deep · 74 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70007l22 (also filed as ak0201r5bgrh). Read Sat, Oct 3, 2026, 9:35 PM UTC.