M4.2 earthquake 225 km SSE of False Pass, Alaska
A magnitude 4.2 earthquake struck 225 km SSE of False Pass, Alaska on Thu, Sep 18, 2025, 6:58 PM AKDT (02:58 UTC), 10 km (6 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2025-09-19 02:58:15 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 53.037° N, 161.886° W
- Region
- Alaska
- Felt reports
- 1
- Strongest shaking
- I, not felt shaking
- 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 |
|---|---|---|---|
| 4.2 | mb, body-wave | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.1 · 28 stations |
| 3.8 | ML, local (Richter) | Alaska Earthquake Center | Preliminary |
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- I, not felt shaking
- Peak ground acceleration
- 0.0% of gravity
- Peak ground velocity
- 0.0 cm/s
- Map
- Automatic
Did you feel it?
1 person reported to the USGS what they felt.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 6.4 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- Operator assigned
- Station coverage gap
- 173°
- Stations used
- 41
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 5 in the 30 days before it.
After
- 2.6149 km S of King Cove, Alaska · 350 days ago · 10 km deep · 79 km away
- 2.5130 km S of King Cove, Alaska · 324 days ago · 30 km deep · 97 km away
Before
- 2.3202 km SSE of King Cove, Alaska · 396 days ago · 29 km deep · 84 km away
- 3.0228 km SSE of King Cove, Alaska · 405 days ago · 21 km deep · 61 km away
- 2.3220 km SSE of King Cove, Alaska · 406 days ago · 2 km deep · 29 km away
- 2.2272 km SSE of King Cove, Alaska · 407 days ago · 12 km deep · 57 km away
- 2.7234 km S of Sand Point, Alaska · 408 days ago · 35 km deep · 97 km away
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000qx6u (also filed as ak025c1cc99t). Read Sat, Oct 3, 2026, 5:09 AM UTC.