M5.1 earthquake 51 km N of Atka, Alaska
A magnitude 5.1 earthquake struck 51 km N of Atka, Alaska on Sun, Jul 12, 1998, 2:15 AM HADT (11:15 UTC), 173 km (108 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
- 1998-07-12 11:15:59 UTC
- Depth
- 173.4 km (107.7 mi), intermediate-depth
- Epicenter
- 52.648° N, 174.333° 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 |
| 5.09 | Mw, moment | ISC-GEM global catalog | Final · ±0.1 |
| 5.1 | Mwc, centroid moment | Global CMT project | Preliminary |
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
- Oblique reverse
- Nodal plane 1
- Strike 207°, dip 54°, rake 32°
- Nodal plane 2
- Strike 98°, dip 65°, rake 140°
How well it is located
Reviewed by a seismologist.
- Depth from
- CONSTRAINED_BY_DEPTH_PHASES
Nearby
Within 100 km, magnitude 2.1 and up: 4 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0008rce (also filed as gcmtb071298e, gcmt19980712111559, iscgem1166069). Read Fri, Oct 2, 2026, 5:20 PM UTC.