Alaska earthquakes

M2.8 earthquake 194 km S of Unalaska, Alaska

A magnitude 2.8 earthquake struck 194 km S of Unalaska, Alaska on Tue, Jul 24, 2018, 4:12 AM AKDT (12:12 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.4 136 km ESE of Nikolski, Alaska. This one was a foreshock.

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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
2.8 (ml), micro
Local time
UTC
2018-07-24 12:12:44 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
52.148° N, 166.039° 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 5.9 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.15
Depth from
Operator assigned
Station coverage gap
219°, poorly surrounded by stations
Stations used
31

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 3.2174 km SSE of Unalaska, Alaska · 2987 days ago · 10 km deep · 23 km away
  2. 4.4136 km ESE of Nikolski, Alaska · 2984 days ago · 10 km deep · 79 km away
  3. 3.3152 km ESE of Nikolski, Alaska · 2980 days ago · 10 km deep · 60 km away
  4. 2.0147 km S of Unalaska, Alaska · 2961 days ago · 18 km deep · 60 km away
  5. 1.9147 km ESE of Nikolski, Alaska · 2957 days ago · 17 km deep · 66 km away
  6. 2.7123 km ESE of Nikolski, Alaska · 2955 days ago · 35 km deep · 93 km away
  7. 3.8198 km SSE of Unalaska, Alaska · 2952 days ago · 10 km deep · 7 km away
  8. 3.9172 km SSE of Unalaska, Alaska · 2949 days ago · 10 km deep · 56 km away
  9. 1.8south of the Aleutian Islands · 2949 days ago · 10 km deep · 83 km away
  10. 2.1200 km SSE of Unalaska, Alaska · 2947 days ago · 5 km deep · 44 km away
  11. 1.6124 km ESE of Nikolski, Alaska · 2946 days ago · 26 km deep · 92 km away
  12. 2.5194 km SE of Nikolski, Alaska · 2943 days ago · 19 km deep · 72 km away
  13. 1.8158 km ESE of Nikolski, Alaska · 2933 days ago · 25 km deep · 55 km away
  14. 1.9174 km SSE of Unalaska, Alaska · 2933 days ago · 23 km deep · 80 km away

Before

  1. 2.9south of the Aleutian Islands · 2999 days ago · 10 km deep · 42 km away
  2. 3.3148 km SE of Nikolski, Alaska · 2999 days ago · 28 km deep · 72 km away
  3. 4.6135 km S of Unalaska, Alaska · 3006 days ago · 32 km deep · 64 km away
  4. 2.8158 km ESE of Nikolski, Alaska · 3020 days ago · 10 km deep · 52 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000ghm6 (also filed as ak19992268, ak0189f8e0p5). Read Wed, Sep 30, 2026, 10:18 PM UTC.