According to the seismological center affiliated to Tehran University Geophysics Institute, the quake occurred at 22:42 hours local time (18:12 GMT).
The tremor took place in the depth of 10 km underground.
There is no immediate report on possible casualties or damage caused by the quake.
Iran sits astride several major faults in the earth's crust, and is prone to frequent earthquakes, many of which have been devastating.
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