A series of earthquakes measuring five or more on the Richter scale have struck along the Iran-Iraq border, according to the US Geological Survey. All struck within an hour of each other, beginning at 0659 GMT. All the information could change as scientists examine the data.
Online reports said people rushed into the streets as the tremors hit.
A magnitude 7.3 natural disaster in the same area in mid-November killed at least 530 and injured more than 8000. "If there was a stressed fault that's ready to move, they happen like that until the stresses are relieved, so it's not too unusual".
More than 530 people died in that natural disaster in Iran.
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The epicenter of the quake was 31 km west of Kerinshah at a depth of 10 km. In Iraq, nine people were killed and 550 were injured, according to the United Nations. Many people are still living in temporary homes and tents.
Iran is located on major seismic faults and experiences nearly a quake per day on average. Earlier in the morning, a 5.1-magnitude quake had rattled Kerman province in southern Iran.
On November 12, a 7.3-magnitude quake killed 620 people in Kermanshah and eight in Iraq.
There were no immediate reports of injuries or damage. In 2003, a 6.6 magnitude quake flattened the historic city of Bam, killing 26,000 people. Earthquakes of magnitude 5 and up to 5.9 are classified as moderate.