(ANSA) - Rome, November 14 - About 30 tremors were reported between midnight and 7:00 on Monday in central Italy, the National Institute for Geophysics and Volcanology (INGV) reported.

The strongest was a magnitude-4 quake at 2:33 am with an epicenter close to the Marche town of Castelsantangelo sul Nera, near Macerata.

Meanwhile, students in the quake-hit cities of Ascoli Piceno, Macerata, Norcia and San Benedetto returned to school on Monday.

Middle and high school students in Norcia, which was hit by Italy's biggest quake since 1980 last month, found a backpack with the Italian flag and a copy of the constitution to welcome them back. The emergency in central Italy started on August 24, when a 6.0-magnitude quake killed 298 people.

Two more quakes shook the area on October 26, one measuring 5.4 in magnitude and the other 5.9. A further 6.5-magnitude quake on October 30 was reported near Norcia.

