Third earthquake measuring 4.2 on Richter scale shocked Abdan town in southern province of Bushehr on Sunday afternoon, IRNA reported.
According to the seismography center affiliated to Tehran University Geophysics Institute, the tremor occurred at 17:02 hours local time ( 1232 hours GMT) and its epicenter was at 51.58 degrees latitude and 28.24 degrees longitude.
There is no immediate report on the possible casualties or damages.
Two other earthquakes measuring 4.1 and 3.6 rocked Kaki region in Bushehr province at 13:39(09:9 hours GMT) and 15:29(10:59 hours GMT).
In the meantime, an earthquake measuring 4 on the Richter scale jolted Kaki in the early hours on Sunday.
According to the seismography center affiliated to Tehran University Geophysics Institute, the tremor occurred at 01:11 hours local time (2041 GMT on Saturday) and its epicenter was at 28.52 degrees latitude and 51.91 degrees longitude and in depth of 35 kilometers underground.
Meanwhile, an earthquake measuring 6.1 on Richter scale jolted areas of Kaki, Shanbeh and Tasouj last Tuesday which left 37 dead and 850 injured.
Iran sits astride several major faults in the earthˈs crust, and is prone to frequent earthquakes, many of which have been devastating.