The US Geological Survey (USGS) said the quake measured a magnitude of 7.3 at a shallow depth of 33 kilometres, while an Iraqi meteorology official put its magnitude at 6.5, according to preliminary information.
The natural disaster on Sunday measured 6.5 magnitude, the official said according to preliminary results.
Iran's state TV reported that at least eight villages were damaged in the quake.
One killed, another 100 were injured in Iraq as a result of the quake on the Iran-Iraq border, a source in the health sector of the Iraqi province of Diyala told.
Scores of people were injured in the border city of Qasr-e Shirin in Iran, state TV reported.More news: Korea, China mend ties, reaffirm efforts to denuclearize N. Korea
Many residents in the Iraqi capital of Baghdad rushed out of houses and tall buildings in panic. The University of Tehran has reported at least four aftershocks, the biggest of which was magnitude-4.6.
The semi-official Iranian ILNA news agency reported that at least 14 provinces had been impacted by the quake. Eight villages were damaged ...
Iranian provinces in the northwestern, western and central areas of the country were impacted, according to Iranian state TV.
It was felt for about 20 seconds in Baghdad, and sometimes for longer in other provinces of Iraq, AFP journalists said.
Residents in the UAE took to social media to report they felt the tremors.