According to the Seismological Center affiliated to the Institute of Geophysics of Tehran University, the epicenter of the quake was registered at 45.59 degrees longitude and 33.72 degrees latitude at the depth of 10 kilometers underground, IRNA reported.
The temblor was reported to have no casualties or property damages.
The area was jolted by twin quakes measuring 5.6 and 5.4 on the Richter scale on January 11.
Kermanshah has been shaken by several earthquakes since November 12, 2017, when a 7.3 magnitude earthquake hit the province's Ezgeleh region killing at least 620 people and injuring over 12,000.
Kermanshah is still prone to aftershocks.
336 quakes rock western Iran in 10 days
The city of Sumar in western Iran has so far been rocked by 336 quakes since Jan 11, Head of Kermanshah seismological center said.
“The mentioned tremors started on Jan 11 at 10:30 hours local time (7:00 GMT) and the last one happened today at 10 AM (6:30 GMT),” Farhad Forouzi told the IRNA.
“From among the 336 earthquakes, 23 measured over 4 magnitude on the Richter scale, seven were more than five Richter and 16 others were between four and five Richter,” he said.
Forouzi rejected possibility of tremors with over 5.5 magnitude on the Richter scale in Sumar, while adding that the area will be prone to shocks for one month.
Iran sits astride several major faults in the earth's crust and is prone to frequent earthquakes.
Western province of Kermanshah has been jolted by several earthquakes since November 12, 2017 when a 7.3 magnitude earthquake hit the provincial city of Ezgeleh region killing at least 620 people and injuring over 12,000.