An earthquake measuring 4.9 degrees on Richter scale jolted Mojen region in central northern province of Semnan on early Sunday morning, IRNA reported.
According to a report by Seismological center affiliated to the Geophysics Institute of Tehran University, the tremor occurred at 02:04:19 hours local time (21:34:19 hours GMT) and its epicenter was registered at 36.67 degrees in latitude and 54.70 degrees in longitude.
There was no immediate report on possible casualties or damage caused by the quake.
Iran sits astride several major faults in the earthˈs crust, and is prone to frequent earthquakes, many of which have been devastating.
The worst in recent times hit Bam in Kerman province in December 2003, killing 31,000 people - about a quarter of its population - and destroying the cityˈs ancient mud-built citadel.
The deadliest quake in the country was in June 1990 and measured 7.7 on the Richter scale.
About 37,000 people were killed and more than 100,000 injured in the northwestern provinces of Gilan and Zanjan. It devastated 27 towns and about 1,870 villages.
In August 2012, two quakes in Northwestern Iran also claimed the lives of 306 people and injured more than 4,500 others.