M4.5 earthquake 55 km SSE of Adak, Alaska
A magnitude 4.5 earthquake struck 55 km SSE of Adak, Alaska on Wed, Sep 17, 1997, 7:40 AM HADT (16:40 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.2 87 km E 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
- 4.5 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1997-09-17 16:40:41 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.459° N, 176.193° 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: 5 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.986 km WSW of Atka, Alaska · 10601 days ago · 56 km deep · 74 km away
- 5.287 km E of Adak, Alaska · 10590 days ago · 62 km deep · 71 km away
- 4.571 km ESE of Adak, Alaska · 10569 days ago · 33 km deep · 35 km away
- 4.555 km SSE of Adak, Alaska · 10566 days ago · 33 km deep · 14 km away
- 4.483 km SSW of Adak, Alaska · 10563 days ago · 33 km deep · 76 km away
Before
- 4.271 km SSW of Adak, Alaska · 10608 days ago · 33 km deep · 57 km away
- 4.061 km E of Adak, Alaska · 10614 days ago · 53 km deep · 63 km away
- 4.646 km SSW of Adak, Alaska · 10622 days ago · 33 km deep · 46 km away
- 4.582 km SW of Adak, Alaska · 10623 days ago · 33 km deep · 99 km away
- 4.175 km SE of Adak, Alaska · 10631 days ago · 33 km deep · 20 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00087n9. Read Thu, Oct 1, 2026, 8:51 PM UTC.