Alaska earthquakes

M3.2 earthquake 99 km SW of Adak, Alaska

A magnitude 3.2 earthquake struck 99 km SW of Adak, Alaska on Mon, Apr 27, 1998, 6:15 PM HADT (03:15 UTC), 61 km (38 mi) below the surface.

A larger quake followed: M4.3 122 km SW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
3.2 (mb, body-wave), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1998-04-28 03:15:29 UTC
Depth
61.1 km (38.0 mi), shallow
Epicenter
51.270° N, 177.686° 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.

Depth from
CONSTRAINED_BY_DEPTH_PHASES

Nearby

Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 3.370 km S of Adak, Alaska · 10376 days ago · 33 km deep · 85 km away
  2. 4.2119 km WSW of Adak, Alaska · 10372 days ago · 33 km deep · 35 km away
  3. 4.3122 km SW of Adak, Alaska · 10366 days ago · 33 km deep · 25 km away
  4. 4.158 km SSE of Adak, Alaska · 10353 days ago · 33 km deep · 98 km away
  5. 3.7111 km SW of Adak, Alaska · 10347 days ago · 33 km deep · 17 km away
  6. 4.293 km SSW of Adak, Alaska · 10341 days ago · 33 km deep · 59 km away
  7. 4.1160 km WSW of Adak, Alaska · 10340 days ago · 33 km deep · 79 km away
  8. 4.2175 km WSW of Adak, Alaska · 10339 days ago · 33 km deep · 93 km away

Before

  1. 4.635 km SW of Adak, Alaska · 10387 days ago · 40 km deep · 64 km away
  2. 4.652 km SW of Adak, Alaska · 10393 days ago · 43 km deep · 47 km away
  3. 4.0140 km W of Adak, Alaska · 10404 days ago · 33 km deep · 81 km away
  4. 3.876 km SSW of Adak, Alaska · 10411 days ago · 33 km deep · 32 km away
  5. 4.6126 km WSW of Adak, Alaska · 10411 days ago · 33 km deep · 36 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0008m2g. Read Fri, Oct 2, 2026, 3:20 AM UTC.