M5.1 earthquake 235 km WSW of Adak, Alaska
A magnitude 5.1 earthquake struck 235 km WSW of Adak, Alaska on Sun, Nov 8, 1998, 1:48 PM HAST (23:48 UTC), 33 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.1 (Mwc, centroid moment), moderate
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1998-11-08 23:48:47 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 51.334° N, 179.925° W
- Region
- Alaska
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Magnitude estimates
Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 5.1 | Mwc, centroid moment | USGS National Earthquake Information Center | Preferred · Reviewed |
| 5.07 | Mw, moment | ISC-GEM global catalog | Final · ±0.1 |
| 5.1 | Mwc, centroid moment | Global CMT project | Preliminary |
What happened
The USGS’s account of the effects of this earthquake.
Felt (III) on Adak.
From the USGS event page for usp0008xvq. U.S. Geological Survey text and figures are in the public domain.
Did you feel it?
No one has reported feeling this quake to the USGS.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Reverse (thrust)
- Nodal plane 1
- Strike 253°, dip 31°, rake 114°
- Nodal plane 2
- Strike 46°, dip 62°, rake 76°
How well it is located
Reviewed by a seismologist.
- Depth from
- OPERATOR_ASSIGNED
Nearby
Within 100 km, magnitude 2.1 and up: 7 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.5230 km WSW of Adak, Alaska · 10191 days ago · 33 km deep · 10 km away
- 4.8Rat Islands, Aleutian Islands, Alaska · 10180 days ago · 33 km deep · 95 km away
- 4.5139 km WSW of Adak, Alaska · 10172 days ago · 33 km deep · 96 km away
- 4.3233 km WSW of Adak, Alaska · 10158 days ago · 33 km deep · 12 km away
- 3.9253 km WSW of Adak, Alaska · 10153 days ago · 33 km deep · 60 km away
- 4.2229 km W of Adak, Alaska · 10148 days ago · 120 km deep · 56 km away
- 3.6295 km W of Adak, Alaska · 10135 days ago · 33 km deep · 85 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0008xvq (also filed as gcmtb110898g, gcmt19981108234847, iscgem1323072). Read Sat, Oct 3, 2026, 4:35 PM UTC.