Alaska earthquakes

M2.7 earthquake 174 km SSE of Atka, Alaska

A magnitude 2.7 earthquake struck 174 km SSE of Atka, Alaska on Tue, Aug 18, 2020, 7:08 AM HADT (16:08 UTC), 19 km (12 mi) below the surface.

A larger quake followed: M4.1 180 km SSE of Atka, 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
2.7 (ml), micro
Local time
UTC
2020-08-18 16:08:21 UTC
Depth
19.2 km (11.9 mi), shallow
Epicenter
50.796° N, 173.082° 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 10.4 km horizontally, 19.0 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
315°, poorly surrounded by stations
Stations used
17

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 9 in the 30 days before it.

After

  1. 1.9129 km SE of Atka, Alaska · 2231 days ago · 21 km deep · 68 km away
  2. 2.8190 km SSE of Atka, Alaska · 2222 days ago · 10 km deep · 17 km away
  3. 3.1162 km SSE of Atka, Alaska · 2219 days ago · 21 km deep · 35 km away
  4. 2.2148 km S of Atka, Alaska · 2212 days ago · 14 km deep · 61 km away
  5. 2.7166 km SSE of Atka, Alaska · 2206 days ago · 10 km deep · 9 km away
  6. 2.2211 km SSE of Atka, Alaska · 2206 days ago · 10 km deep · 46 km away
  7. 2.7176 km SSE of Atka, Alaska · 2204 days ago · 10 km deep · 21 km away
  8. 3.1200 km SE of Atka, Alaska · 2203 days ago · 10 km deep · 96 km away
  9. 2.9116 km ESE of Atka, Alaska · 2201 days ago · 35 km deep · 99 km away
  10. 1.6139 km S of Atka, Alaska · 2195 days ago · 5 km deep · 81 km away
  11. 1.583 km SSE of Atka, Alaska · 2195 days ago · 8 km deep · 94 km away
  12. 1.787 km SSE of Atka, AK · 2195 days ago · 39 km deep · 87 km away
  13. 2.3231 km SSE of Atka, Alaska · 2194 days ago · 8 km deep · 68 km away
  14. 2.2214 km S of Atka, Alaska · 2194 days ago · 8 km deep · 69 km away
  15. 1.7152 km S of Atka, Alaska · 2194 days ago · 5 km deep · 78 km away
  16. 4.1180 km SSE of Atka, Alaska · 2184 days ago · 24 km deep · 13 km away
  17. 2.3171 km SSE of Atka, Alaska · 2178 days ago · 12 km deep · 25 km away

Before

  1. 3.0153 km SSE of Atka, Alaska · 2235 days ago · 10 km deep · 25 km away
  2. 2.0134 km S of Atka, Alaska · 2240 days ago · 7 km deep · 67 km away
  3. 2.6123 km ESE of Atka, Alaska · 2241 days ago · 35 km deep · 96 km away
  4. 1.983 km SSE of Atka, Alaska · 2247 days ago · 19 km deep · 91 km away
  5. 1.8141 km SSE of Atka, Alaska · 2253 days ago · 9 km deep · 37 km away
  6. 3.387 km SE of Atka, Alaska · 2255 days ago · 22 km deep · 94 km away
  7. 3.2182 km SSE of Atka, Alaska · 2255 days ago · 10 km deep · 41 km away
  8. 2.8121 km SE of Atka, Alaska · 2256 days ago · 156 km deep · 84 km away
  9. 3.2133 km SE of Atka, Alaska · 2258 days ago · 35 km deep · 57 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000bhwt (also filed as ak020amapv69). Read Tue, Sep 29, 2026, 12:46 PM UTC.