M4.9 Earthquake 140 km ENE of M?n?b, Iran — October 21, 2021
2021-10-21 06:05:10 UTC (2021-10-21) · approx. 10:05 AM UTC+4 local
On October 21, 2021 at 06:05 UTC, a magnitude 4.9 shallow crustal earthquake struck 140 km ENE of M?n?b, Iran, at a depth of 10.0 km and coordinates 27.6655°, 58.3738°.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 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
58.3738°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake near M?n?b, Iran?
The magnitude 4.9 earthquake that struck 140 km ENE of M?n?b, Iran on October 21, 2021 at 06:05 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 27.6655°, 58.3738°, which is 140 km ENE of M?n?b, Iran. View all earthquakes in Iran.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 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 4.9 event is significantly smaller than that historical record.
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Location
Authoritative source: USGS event page (event ID: us6000fwcg). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, October 21, 2021). M4.9 Earthquake 140 km ENE of M?n?b, Iran — October 21, 2021. Retrieved December 22, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000fwcg/