3.5

M3.5 Earthquake 41 km W of Cohoe, AlaskaFebruary 13, 2025

2025-02-13 20:52:16 UTC (2025-02-13) · approx. 10:52 AM UTC-10 local

MagnitudeM3.5(ml)
Time20:52 UTC10:52 AM UTC-10
Depth87.4 kmintermediate depth
Coordinates60.415°, -152.045°
Felt by1DYFI response
Status✓ Reviewed by USGS

On February 13, 2025 at 20:52 UTC, a magnitude 3.5 intermediate depth earthquake struck 41 km W of Cohoe, Alaska, at a depth of 87.4 km and coordinates 60.4150°, -152.0451°.

Physical scale: An earthquake of magnitude 3.5 releases seismic energy equivalent to roughly 2.7 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 157 m — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at 60.41°, -152.05°

Did You Feel It? — community-reported shaking

Aggregated felt-report intensity from 1 citizen response to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.

USGS DYFI community-reported intensity map for the M3.5 earthquake near 41 km W of Cohoe, Alaska

Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report

Earthquake Details

Magnitude
3.5 ml
Depth
87.4 km
intermediate depth
Location
60.4150°N
-152.0451°E
Felt Reports
1
DYFI responses
Community Intensity
2.0
CDI from reports

Technical Information

Event ID
ak025213v4b7
Event Type
earthquake
Status
✓ Reviewed
Significance
189
RMS Residual
0.68 sec
Last Updated
2025-05-02 16:26:17 UTC

Common Questions

How strong was the magnitude 3.5 earthquake near Cohoe, Alaska?

The magnitude 3.5 earthquake that struck 41 km W of Cohoe, Alaska on February 13, 2025 at 20:52 UTC had a depth of 87.4 km. For context, this was a minor earthquake typically detected only by instruments.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.5 earthquakes can continue for several days and gradually diminish over time.

Understanding This Data

Magnitude 3.5 earthquakes are typically only recorded by instruments.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: ak025213v4b7). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2025, February 13, 2025). M3.5 Earthquake 41 km W of Cohoe, AlaskaFebruary 13, 2025. Retrieved May 2, 2025 from https://www.earthquaketracker.org/earthquakes/event/ak025213v4b7/