M4.9 Earthquake 27 km S of Javānrūd, Iran — July 20, 2026
2026-07-20 03:43:19 UTC (18 hours ago) · approx. 6:43 AM UTC+3 local
Aftershock of the M5.2 mainshock.
On July 20, 2026 at 03:43 UTC, a magnitude 4.9 shallow crustal earthquake struck 27 km S of Javānrūd, Iran, at a depth of 10.0 km and coordinates 34.5466°, 46.5103°. This earthquake was detected by 60 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 369, placing it among routine seismic activity.
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.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.2 mainshock that occurred 18 hours ago 27 km S of Javānrūd, Iran. Since the mainshock, the USGS has recorded 1 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
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
46.5103°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.9 earthquake near Javānrūd, Iran?
The magnitude 4.9 earthquake that struck 27 km S of Javānrūd, Iran on July 20, 2026 at 03:43 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 34.5466°, 46.5103°, which is 27 km S of Javānrūd, 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.
Is this the same earthquake as the M5.2 one earlier?
No. This magnitude 4.9 earthquake is an aftershock of the larger magnitude 5.2 mainshock that occurred earlier 27 km S of Javānrūd, Iran. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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.
Actions
Location
Authoritative source: USGS event page (event ID: us7000t1vp). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 20, 2026). M4.9 Earthquake 27 km S of Javānrūd, Iran — July 20, 2026. Retrieved July 20, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000t1vp/