M4.7 earthquake 139 km SW of Adak, Alaska
A magnitude 4.7 earthquake struck 139 km SW of Adak, Alaska on Sun, Aug 31, 1997, 10:40 PM HADT (07:40 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.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1997-09-01 07:40:24 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.175° N, 178.297° 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 1.7 and up: 11 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.3224 km WSW of Adak, Alaska · 10620 days ago · 60 km deep · 100 km away
- 4.9Andreanof Islands, Aleutian Islands, Alaska · 10610 days ago · 53 km deep · 39 km away
- 4.271 km SSW of Adak, Alaska · 10608 days ago · 33 km deep · 95 km away
- 4.9216 km WSW of Adak, Alaska · 10606 days ago · 33 km deep · 87 km away
- 5.6212 km WSW of Adak, Alaska · 10606 days ago · 33 km deep · 84 km away
- 4.9113 km WSW of Adak, Alaska · 10585 days ago · 33 km deep · 37 km away
- 4.587 km SW of Adak, Alaska · 10583 days ago · 33 km deep · 52 km away
- 4.6136 km WSW of Adak, Alaska · 10582 days ago · 33 km deep · 22 km away
- 6.499 km WSW of Adak, Alaska · 10579 days ago · 22 km deep · 41 km away
- 4.7107 km SW of Adak, Alaska · 10577 days ago · 33 km deep · 32 km away
- 4.1106 km W of Adak, Alaska · 10575 days ago · 110 km deep · 95 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0008705. Read Fri, Oct 2, 2026, 5:54 AM UTC.