It caused severe damages and at least 15 people were killed.
“More than 50 aftershocks struck northern Italy overnight as thousands of people slept in tents or out in the open for fear of returning to their homes, a day after 16 people lost their lives and more than 300 were injured by a powerful earthquake.
The aftershocks rattled the nerves of the 14,000 people who have been left homeless by the earthquake which hit Emilia-Romagna on Tuesday and a previous one which hit the region on May 20.
Rescuers were searching for one missing person – the employee of an electronics warehouse in the town of Medolla, one of the towns at the epicentre of the quake.
Experts said the aftershocks could continue for days or even weeks, compounding the fear and uncertainty of the tens of thousands of people affected by the natural disaster in a triangle between the cities of Bologna, Ferrara and Modena.
The president of the institute, Stefano Gresta, said: “One cannot exclude the possibility that there could be more powerful earthquakes.” Tuesday’s earthquake hit towns and villages which were already battered from the quake of May 20.