4.2

M4.2 Earthquake 131 km ESE of Severo-Kuril’sk, RussiaAugust 1, 2025

2025-08-01 22:24:53 UTC (2025-08-01) · approx. 9:24 AM UTC+11 local

MagnitudeM4.2(mb)
Time22:24 UTC9:24 AM UTC+11
Depth26.8 kmshallow crustal
Coordinates50.432°, 157.938°
Felt byNo felt reports
Status✓ Reviewed by USGS

On August 1, 2025 at 22:24 UTC, a magnitude 4.2 shallow crustal earthquake struck 131 km ESE of Severo-Kuril’sk, Russia, at a depth of 26.8 km and coordinates 50.4325°, 157.9377°.

Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at 50.43°, 157.94°

Earthquake Details

Magnitude
4.2 mb
Depth
26.8 km
shallow crustal
Location
50.4325°N
157.9377°E

Technical Information

Event ID
us6000r350
Event Type
earthquake
Status
✓ Reviewed
Significance
271
Stations Used
27
Azimuthal Gap
137.0°
Min Station Distance
2.632°
RMS Residual
0.91 sec
Last Updated
2025-10-17 22:51:42 UTC

Common Questions

How strong was the magnitude 4.2 earthquake near Severo-Kuril’sk, Russia?

The magnitude 4.2 earthquake that struck 131 km ESE of Severo-Kuril’sk, Russia on August 1, 2025 at 22:24 UTC had a depth of 26.8 km. For context, this was a light earthquake commonly felt near the epicenter.

Were there aftershocks?

Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.2 earthquakes can continue for several days and gradually diminish over time.

Understanding This Data

Magnitude 4.2 earthquakes are often felt but rarely cause damage.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: us6000r350). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2025, August 1, 2025). M4.2 Earthquake 131 km ESE of Severo-Kuril’sk, RussiaAugust 1, 2025. Retrieved October 17, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000r350/