M4.7 Earthquake 104 km NNE of Bandar-e Lengeh, Iran — October 10, 2021
2021-10-10 16:11:25 UTC (2021-10-10) · approx. 8:11 PM UTC+4 local
On October 10, 2021 at 16:11 UTC, a magnitude 4.7 shallow crustal earthquake struck 104 km NNE of Bandar-e Lengeh, Iran, at a depth of 10.0 km and coordinates 27.4482°, 55.2274°.
Physical scale: An earthquake of magnitude 4.7 releases seismic energy equivalent to roughly 169 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.1 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Iran, a region characterized by the Zagros fold-and-thrust belt, where the Arabian Plate collides with Eurasia at 20-25 mm per year. The nearest mapped fault system is the Zagros Fault. View all earthquakes in Iran.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
55.2274°E
Technical Information
Common Questions
How strong was the magnitude 4.7 earthquake near Bandar-e Lengeh, Iran?
The magnitude 4.7 earthquake that struck 104 km NNE of Bandar-e Lengeh, Iran on October 10, 2021 at 16:11 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 27.4482°, 55.2274°, which is 104 km NNE of Bandar-e Lengeh, Iran. View all earthquakes in Iran.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.7 earthquakes can continue for several days and gradually diminish over time.
Has Iran had earthquakes this big before?
The largest recorded earthquake in Iran was the M7.8 Tabas earthquake of September 16, 1978. Today's magnitude 4.7 event is significantly smaller than that historical record.
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Location
Authoritative source: USGS event page (event ID: us6000ftj0). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, October 10, 2021). M4.7 Earthquake 104 km NNE of Bandar-e Lengeh, Iran — October 10, 2021. Retrieved December 18, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000ftj0/