Alaska earthquakes

M4.2 earthquake 119 km WSW of Adak, Alaska

A magnitude 4.2 earthquake struck 119 km WSW of Adak, Alaska on Sat, May 9, 1998, 6:12 PM HADT (03:12 UTC), 33 km (21 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
4.2 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1998-05-10 03:12:22 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.371° N, 178.161° 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
OPERATOR_ASSIGNED

Nearby

Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 4.3122 km SW of Adak, Alaska · 10366 days ago · 33 km deep · 23 km away
  2. 3.7111 km SW of Adak, Alaska · 10347 days ago · 33 km deep · 20 km away
  3. 3.6192 km WSW of Adak, Alaska · 10342 days ago · 33 km deep · 85 km away
  4. 4.293 km SSW of Adak, Alaska · 10341 days ago · 33 km deep · 93 km away
  5. 4.1160 km WSW of Adak, Alaska · 10340 days ago · 33 km deep · 45 km away
  6. 4.2175 km WSW of Adak, Alaska · 10339 days ago · 33 km deep · 59 km away
  7. 3.664 km SSW of Adak, Alaska · 10316 days ago · 33 km deep · 78 km away

Before

  1. 3.299 km SW of Adak, Alaska · 10384 days ago · 61 km deep · 35 km away
  2. 4.635 km SW of Adak, Alaska · 10387 days ago · 40 km deep · 88 km away
  3. 4.652 km SW of Adak, Alaska · 10393 days ago · 43 km deep · 69 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0008mt1. Read Fri, Oct 2, 2026, 3:19 AM UTC.