M5.8 earthquake 71 km S of Adak, Alaska
A magnitude 5.8 earthquake struck 71 km S of Adak, Alaska on Thu, Jul 17, 1958, 8:02 AM GMT-11 (19:02 UTC), 25 km (16 mi) below the surface.
A larger quake followed: M5.9 68 km S 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
- 5.8 (mw), moderate
- Local time
- UTC
- 1958-07-17 19:02:18 UTC
- Depth
- 25.0 km (15.5 mi), shallow
- Epicenter
- 51.228° N, 176.662° 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.
- Magnitude uncertainty
- ±0.31
- Depth from
- From location
Nearby
Within 100 km, magnitude 2.5 and up: 5 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.968 km S of Adak, Alaska · 24904 days ago · 25 km deep · 4 km away
- 5.973 km S of Adak, Alaska · 24903 days ago · 25 km deep · 13 km away
- 6.3100 km ESE of Adak, Alaska · 24876 days ago · 35 km deep · 93 km away
- 6.166 km SE of Adak, Alaska · 24874 days ago · 25 km deep · 50 km away
- 5.883 km SSE of Adak, Alaska · 24873 days ago · 15 km deep · 35 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem884758 (also filed as ushis2322). Read Tue, Sep 22, 2026, 8:44 AM UTC.