The seismological base of Tehran University's Geophysics Institute registered the epicenter of the tremor at south of Doroud.
It occurred at 08:48 hours local time (0418 GMT).
There were no immediate reports of any casualties or damages to properties.
Iran is situated on some of the world's most active seismic fault lines and quakes of varying magnitudes are of usual occurrence.
... Payvand News - 5/28/04 ... --