M4.3 Earthquake 18 km N of Bojnūrd, Iran — September 21, 2024
2024-09-21 23:51:49 UTC (2024-09-21) · approx. 3:51 AM UTC+4 local
On September 21, 2024 at 23:51 UTC, a magnitude 4.3 shallow crustal earthquake struck 18 km N of Bojnūrd, Iran, at a depth of 10.0 km and coordinates 37.6412°, 57.3162°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
57.3162°E
Technical Information
Common Questions
How strong was the magnitude 4.3 earthquake near Bojnūrd, Iran?
The magnitude 4.3 earthquake that struck 18 km N of Bojnūrd, Iran on September 21, 2024 at 23:51 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000ntkd). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, September 21, 2024). M4.3 Earthquake 18 km N of Bojnūrd, Iran — September 21, 2024. Retrieved November 23, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000ntkd/