Several earthquakes measuring over 5 magnitude Thursday hit border areas inside neighboring Iran and were felt in eastern and central Iraq, geological website and Iraqi official television reported.
The epicentre, with a depth of 8km, was determined to be at 33.78 degrees latitude and 45.74 degrees longitude.
The USGS says the preliminary magnitude of six of the temblors was at least 5, while the seventh was a magnitude 4.
On November 12, a 7.3-magnitude quake hit Kermanshah, killing more than 620 people and injuring around 10,000 others, mainly in the city of Sarpol-e Zahab and the nearby villages.
Randy Baldwin, a geophysicist with the USGS National Earthquake Information Centre in Colorado, said the quakes appeared to be aftershocks from the November tremor.
More than 530 people died in that quake in Iran.
The temblors hit on Thursday morning, were felt far and wide and even rattled the Iraqi capital of Baghdad. No injuries or damage were reported. Extensive damage was caused to infrastructure in the area. In Iraq, nine people were killed and 550 were injured, according to the United Nations.
The region, largely rebuilt in recent decades after Iran and Iraq's ruinous 1980s war, saw many buildings collapse or sustain major damage in the November quake.
Late Thursday afternoon, another 4.8 magnitude natural disaster struck in Kerman, according to the USGS. In 2003, a 6.6-magnitude quake flattened the historic city of Bam, killing 26,000 people.