An earthquake measuring 4.2 on Richter scale shook the vicinity of Jam city in Bushehr province, southern Iran, Sunday night, Iran's news agency "IRNA" reported. The Geophysics Institute of Tehran University registered the quake. The epicenter of the tremor has been an area located 52.26 degrees in longitude and 28.04 degrees in latitude. There are no reports of any casualty or damage to the property caused by the tremor. Iran is often shaken by quakes of varying magnitudes as it sits on some of the world's most active seismic fault lines.