Alaska earthquakes

M3.0 earthquake 191 km E of Atka, Alaska

A magnitude 3.0 earthquake struck 191 km E of Atka, Alaska on Tue, Oct 13, 2020, 11:39 PM HADT (08:39 UTC), 37 km (23 mi) below the surface.

A larger quake followed: M4.4 177 km SW of Nikolski, Alaska. This one was a foreshock.

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The earthquake

Magnitude
3.0 (ml), minor
Local time
UTC
2020-10-14 08:39:35 UTC
Depth
36.6 km (22.7 mi), shallow
Epicenter
51.917° N, 171.448° W
Region
Alaska
Tsunami flag
No
Status
Reviewed by a seismologist

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, 24.1 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
216°, poorly surrounded by stations
Stations used
16

Nearby

Within 100 km, magnitude 1.5 and up: 19 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 3.4183 km WSW of Nikolski, Alaska · 2173 days ago · 35 km deep · 26 km away
  2. 3.7128 km SW of Nikolski, Alaska · 2171 days ago · 21 km deep · 82 km away
  3. 2.5192 km ESE of Atka, Alaska · 2164 days ago · 37 km deep · 8 km away
  4. 2.9179 km WSW of Nikolski, Alaska · 2161 days ago · 35 km deep · 31 km away
  5. 3.6126 km WSW of Nikolski, Alaska · 2147 days ago · 47 km deep · 83 km away
  6. 3.2112 km ESE of Atka, Alaska · 2145 days ago · 35 km deep · 83 km away
  7. 2.8120 km WSW of Nikolski, Alaska · 2140 days ago · 25 km deep · 91 km away
  8. 2.9106 km ESE of Atka, Alaska · 2139 days ago · 19 km deep · 92 km away
  9. 4.4177 km SW of Nikolski, Alaska · 2134 days ago · 35 km deep · 33 km away
  10. 3.2132 km WSW of Nikolski, Alaska · 2127 days ago · 28 km deep · 76 km away
  11. 4.1147 km E of Atka, Alaska · 2127 days ago · 34 km deep · 45 km away
  12. 3.6138 km E of Atka, Alaska · 2127 days ago · 103 km deep · 74 km away
  13. 3.1149 km WSW of Nikolski, Alaska · 2127 days ago · 35 km deep · 60 km away
  14. 4.2172 km SW of Nikolski, Alaska · 2122 days ago · 44 km deep · 38 km away
  15. 3.6169 km WSW of Nikolski, Alaska · 2122 days ago · 40 km deep · 40 km away
  16. 3.7178 km SW of Nikolski, Alaska · 2122 days ago · 40 km deep · 34 km away
  17. 2.9135 km ESE of Atka, Alaska · 2122 days ago · 103 km deep · 67 km away
  18. 3.2142 km ESE of Atka, Alaska · 2121 days ago · 35 km deep · 50 km away
  19. 3.4111 km SW of Nikolski, Alaska · 2121 days ago · 35 km deep · 100 km away

Before

  1. 2.7186 km E of Atka, Alaska · 2179 days ago · 35 km deep · 9 km away
  2. 3.0193 km WSW of Nikolski, Alaska · 2188 days ago · 35 km deep · 20 km away
  3. 3.5130 km WSW of Nikolski, Alaska · 2193 days ago · 49 km deep · 81 km away
  4. 3.1131 km WSW of Nikolski, Alaska · 2195 days ago · 35 km deep · 78 km away
  5. 2.9116 km ESE of Atka, Alaska · 2201 days ago · 35 km deep · 94 km away
  6. 3.0194 km ESE of Atka, Alaska · 2202 days ago · 36 km deep · 13 km away
  7. 3.1200 km SE of Atka, Alaska · 2203 days ago · 10 km deep · 88 km away
  8. 2.9170 km SW of Nikolski, Alaska · 2205 days ago · 10 km deep · 71 km away
  9. 3.0209 km SW of Nikolski, Alaska · 2206 days ago · 36 km deep · 30 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000cai2 (also filed as ak020d8frujn). Read Tue, Sep 29, 2026, 5:21 PM UTC.