According to Iranian Students News Agency (ISNA), the quake hit the town of Fariab, south of Kerman Province, at 8:16 am (0446 GMT) local time on Friday.
The epicenter was at 57.34 degrees north latitude and 27.77 degrees east longitude.
No report has yet been issued on the possible damage and casualties caused by the earthquake.
Located on seismic fault lines, Iran is prone to earthquakes and experiences at least one slight tremor every day on average.
The deadliest earthquake to hit Iran in recent years struck the country on December 26, 2003. Back then, a 6.6-magnitude earthquake jolted the city of Bam and its surrounding areas in Kerman province.
The destructive earthquake left 26,271 people dead and 30,000 injured.
