According to the seismological base of Tehran University's Geophysics Institute, the tremor occurred at 01:35 hours local time (2205 GMT on Wednesday).
The seismological base located the epicenter of the quake on the outskirts of Ashkhaneh, measuring 37.48 degrees in latitude and 56.89 degrees in longitude.
Meanwhile two earthquakes, measuring 4.5 and 4.1 on the Richter scale shook the town of Zarand in the southeastern province of Kerman.
According to the seismological base of Tehran University's Geophysics Institute, the tremors occurred at 04:20 hours local time on Thursday (0050 GMT on Wednesday) and 14:53 hours local time on Wednesday (1123 GMT).
There are no reports of damage to property caused by the quakes.
Two earthquakes measuring 3.5 and 4.6 on the open-ended Richter scale also jolted Zarand on Tuesday.
According to the seismological base of Tehran University's Geophysics Institute, the tremors occurred at 16:39 hours local time (1309 GMT) and 19:43 hours local time (1613 GMT).
A strong quake, measuring 6.4 on the Richter scale, struck the town of Zarand in the southeastern Kerman province on February 22, killing over 500 people and injuring hundreds of others.
The epicenter of the quake was 60 kilometers (35 miles) northwest of the provincial capital of Kerman.
According to early estimates, the 6.4 Richter scale quake has inflicted over rls 700 billion of damage upon rural areas and infrastructural installations in the quake-hit region.
The quake destroyed four villages completely and damaged 40 villages by over 25 percent.
Iran is situated on some of the world's most active seismic fault lines and quakes of varying magnitudes are of usual occurrence.
A killer earthquake with a magnitude of 6.7 on the Richter scale flattened the historical city of Bam in Kerman province on December 26, 2003, killing over 30,000 people and injuring thousands more.
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