Alaska earthquakes

M4.2 earthquake 71 km SSW of Adak, Alaska

A magnitude 4.2 earthquake struck 71 km SSW of Adak, Alaska on Mon, Sep 15, 1997, 11:45 AM HADT (20:45 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M6.4 99 km WSW of Adak, Alaska. This one was a foreshock.

More in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
4.2 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
1997-09-15 20:45:19 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
51.257° N, 176.944° 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: 10 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 4.555 km SSE of Adak, Alaska · 10606 days ago · 33 km deep · 57 km away
  2. 4.9113 km WSW of Adak, Alaska · 10585 days ago · 33 km deep · 89 km away
  3. 4.587 km SW of Adak, Alaska · 10583 days ago · 33 km deep · 53 km away
  4. 6.499 km WSW of Adak, Alaska · 10579 days ago · 22 km deep · 68 km away
  5. 4.7107 km SW of Adak, Alaska · 10577 days ago · 33 km deep · 64 km away
  6. 4.571 km ESE of Adak, Alaska · 10569 days ago · 33 km deep · 92 km away
  7. 4.555 km SSE of Adak, Alaska · 10566 days ago · 33 km deep · 43 km away
  8. 4.483 km SSW of Adak, Alaska · 10563 days ago · 33 km deep · 20 km away
  9. 4.7117 km WSW of Adak, Alaska · 10553 days ago · 33 km deep · 89 km away
  10. 4.990 km WSW of Adak, Alaska · 10550 days ago · 33 km deep · 57 km away

Before

  1. 4.646 km SSW of Adak, Alaska · 10622 days ago · 33 km deep · 25 km away
  2. 4.7139 km SW of Adak, Alaska · 10623 days ago · 33 km deep · 95 km away
  3. 4.582 km SW of Adak, Alaska · 10623 days ago · 33 km deep · 53 km away
  4. 4.492 km SW of Adak, Alaska · 10629 days ago · 33 km deep · 50 km away
  5. 4.175 km SE of Adak, Alaska · 10632 days ago · 33 km deep · 65 km away

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00087k7. Read Thu, Oct 1, 2026, 11:01 PM UTC.