Alaska earthquakes

M4.4 earthquake 40 km E of Adak, Alaska

A magnitude 4.4 earthquake struck 40 km E of Adak, Alaska on Thu, Feb 26, 1998, 11:02 PM HAST (09:02 UTC), 48 km (30 mi) below the surface.

A larger quake followed: M4.6 52 km SW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
4.4 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1998-02-27 09:02:59 UTC
Depth
47.6 km (29.6 mi), shallow
Epicenter
51.901° N, 176.046° 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. 4.493 km SW of Atka, Alaska · 10426 days ago · 33 km deep · 63 km away
  2. 4.558 km SSW of Adak, Alaska · 10423 days ago · 33 km deep · 82 km away
  3. 4.549 km SSW of Adak, Alaska · 10423 days ago · 33 km deep · 78 km away
  4. 4.424 km WSW of Adak, Alaska · 10419 days ago · 56 km deep · 64 km away
  5. 3.456 km E of Adak, Alaska · 10414 days ago · 33 km deep · 17 km away
  6. 4.652 km SW of Adak, Alaska · 10394 days ago · 43 km deep · 89 km away
  7. 4.257 km SE of Adak, Alaska · 10393 days ago · 49 km deep · 39 km away
  8. 4.635 km SW of Adak, Alaska · 10388 days ago · 40 km deep · 70 km away

Before

  1. 4.571 km SSW of Adak, Alaska · 10453 days ago · 33 km deep · 96 km away
  2. 4.472 km S of Adak, Alaska · 10456 days ago · 58 km deep · 85 km away
  3. 3.493 km S of Adak, Alaska · 10457 days ago · 33 km deep · 98 km away
  4. 4.640 km ESE of Adak, Alaska · 10458 days ago · 43 km deep · 23 km away
  5. 4.3109 km SE of Adak, Alaska · 10469 days ago · 33 km deep · 82 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0008gpb. Read Fri, Oct 2, 2026, 11:45 AM UTC.