M4.4 Earthquake 115 km SE of D?r?b, Iran — August 22, 2021
2021-08-22 22:27:48 UTC (2021-08-22) · approx. 2:27 AM UTC+4 local
On August 22, 2021 at 22:27 UTC, a magnitude 4.4 shallow crustal earthquake struck 115 km SE of D?r?b, Iran, at a depth of 10.0 km and coordinates 28.1304°, 55.4812°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
55.4812°E
Technical Information
Common Questions
How strong was the magnitude 4.4 earthquake near D?r?b, Iran?
The magnitude 4.4 earthquake that struck 115 km SE of D?r?b, Iran on August 22, 2021 at 22:27 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000f9v7). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, August 22, 2021). M4.4 Earthquake 115 km SE of D?r?b, Iran — August 22, 2021. Retrieved November 2, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000f9v7/