M4.3 Earthquake 108 km SSE of Semnan, Iran — March 18, 2024
2024-03-18 20:23:25 UTC (2024-03-18) · approx. 12:23 AM UTC+4 local
On March 18, 2024 at 20:23 UTC, a magnitude 4.3 shallow crustal earthquake struck 108 km SSE of Semnan, Iran, at a depth of 10.0 km and coordinates 34.6436°, 53.7480°.
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
53.7480°E
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Common Questions
How strong was the magnitude 4.3 earthquake near Semnan, Iran?
The magnitude 4.3 earthquake that struck 108 km SSE of Semnan, Iran on March 18, 2024 at 20:23 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: us6000mjnc). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, March 18, 2024). M4.3 Earthquake 108 km SSE of Semnan, Iran — March 18, 2024. Retrieved May 27, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000mjnc/