M3.8 earthquake 268 km W of Adak, Alaska
A magnitude 3.8 earthquake struck 268 km W of Adak, Alaska on Fri, Jul 17, 1998, 7:37 PM GMT+12 (07:37 UTC), 100 km (62 mi) below the surface.
A larger quake followed: M4.5 Rat Islands, Aleutian Islands, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.8 (mb, body-wave), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1998-07-17 07:37:11 UTC
- Depth
- 100.0 km (62.1 mi), intermediate-depth
- Epicenter
- 51.836° N, 179.468° E
- 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: 4 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.5Rat Islands, Aleutian Islands, Alaska · 10303 days ago · 135 km deep · 50 km away
- 4.0235 km WSW of Adak, Alaska · 10262 days ago · 33 km deep · 79 km away
- 4.4Rat Islands, Aleutian Islands, Alaska · 10249 days ago · 33 km deep · 80 km away
- 4.3Rat Islands, Aleutian Islands, Alaska · 10249 days ago · 33 km deep · 85 km away
Before
- 4.8Rat Islands, Aleutian Islands, Alaska · 10313 days ago · 110 km deep · 69 km away
- 4.5241 km WSW of Adak, Alaska · 10318 days ago · 33 km deep · 85 km away
- 4.0Rat Islands, Aleutian Islands, Alaska · 10325 days ago · 128 km deep · 71 km away
- 4.9Rat Islands, Aleutian Islands, Alaska · 10328 days ago · 133 km deep · 94 km away
- 3.4Rat Islands, Aleutian Islands, Alaska · 10333 days ago · 116 km deep · 42 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0008rp4. Read Fri, Oct 2, 2026, 7:46 AM UTC.