Iraqi Prime Minister Haider al-Abadi has sacked a number of electricity ministry officials, his office said on Thursday, in the latest attempt to quell public anger at chronic power cuts.
More than 300 people including around 100 foreigners have been sentenced to death for belonging to Islamic State.
In the oil hub of Basra, about 3,000 protesters gathered outside the headquarters of the provincial governorate.
Tarik Jadaoun -- known by his nom de guerre Abu Hamza al-Beljiki -- earlier pleaded not guilty to a range of terror, insisting he had "got lost" and pleading for mercy.
There was no immediate claim of responsibility, but most such attacks in Iraq are the work of the Islamic State jihadist group.
The tremor hit the Iranian province of Kermanshah where an earthquake killed 620 people in November, Iranian state TV said.
An Iraqi military parade celebrating final victory over Islamic State is underway in Baghdad's heavily fortified Green Zone, an Iraqi military spokesman told Reuters on Sunday.
Kurdish authorities in Iraq offered on Wednesday to put an independence drive on hold, stepping up efforts to resolve a crisis in relations with Baghdad via dialogue rather than military means.