An natural disaster of magnitude 5.1 hit parts of southern Iran on Thursday, said reports.
All the earthquakes struck within an hour of each other, beginning at 06:59 GMT.
The deadliest quake in Iran's modern history happened in June 1990, devastating many areas in the northern province of Gilan and killing around 37,000 people. There were no reports of significant damage, and electricity and internet services were not interrupted in central Baghdad.
Iranian state television reported people rushed out into the streets amid the temblors.
Earthquakes of magnitude 5 to 5.9 are classified as moderate, and can cause considerable damage. Extensive damage was caused to infrastructure in the area.
On November 12, a 7.3-magnitude quake killed 620 people in Kermanshah and eight in Iraq. In Iraq, nine people were killed and 550 were injured, according to the United Nations.
Earlier on Thursday, the USGS said a magnitude-4.9 quake hit Iran's southern province of Kerman before dawn. The depth of the epicentre was around 10 km.
Iran sits atop several fault lines and has been hit by a series of earthquakes in recent weeks. In 2003, a 6.6 magnitude quake had flattened the historic city of Bam, killing 26,000 people, said reports.
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