M4.0 earthquake 97 km SSE of Adak, Alaska
A magnitude 4.0 earthquake struck 97 km SSE of Adak, Alaska on Mon, Jul 28, 1997, 9:39 PM HADT (06:39 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.6 46 km SSW of Adak, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.0 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1997-07-29 06:39:52 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.019° N, 176.338° 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: 6 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.393 km SSE of Adak, Alaska · 10657 days ago · 33 km deep · 6 km away
- 4.175 km SE of Adak, Alaska · 10632 days ago · 33 km deep · 40 km away
- 4.492 km SW of Adak, Alaska · 10629 days ago · 33 km deep · 98 km away
- 4.646 km SSW of Adak, Alaska · 10622 days ago · 33 km deep · 62 km away
- 4.271 km SSW of Adak, Alaska · 10608 days ago · 33 km deep · 50 km away
- 4.555 km SSE of Adak, Alaska · 10607 days ago · 33 km deep · 50 km away
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00085gy. Read Fri, Oct 2, 2026, 5:10 AM UTC.