M4.0 Earthquake 31 km S of Behbahān, Iran — September 13, 2025
2025-09-13 16:11:07 UTC (2025-09-13) · approx. 7:11 PM UTC+3 local
On September 13, 2025 at 16:11 UTC, a magnitude 4.0 shallow crustal earthquake struck 31 km S of Behbahān, Iran, at a depth of 10.0 km and coordinates 30.3092°, 50.2483°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
50.2483°E
Technical Information
Common Questions
How strong was the magnitude 4.0 earthquake near Behbahān, Iran?
The magnitude 4.0 earthquake that struck 31 km S of Behbahān, Iran on September 13, 2025 at 16:11 UTC had a depth of 10.0 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 4.0 earthquakes can continue for several days and gradually diminish over time.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Actions
Location
Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000rf4f). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, September 13, 2025). M4.0 Earthquake 31 km S of Behbahān, Iran — September 13, 2025. Retrieved May 28, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rf4f/