They said Monday's tremors had magnitudes of 3.1 to 3.2, compared to the 4.9 reading Sunday.
The Italian Interior Ministry also reported more than 100 tremors less than 3-magnitude in the area.
Light damage, including cracks in the walls of a 16th century church in the town of Piedimonte Matese, was reported. Firefighters closed off the Reggia di Caserta, a large 18th century palace in the city of Caserta, the Italian news agency ANSA reported.
Devastating earthquakes in 2009 in northern Italy and in L'Aquila in 2012 convinced Italians to take dangers posed by even small earthquakes seriously, ANSA said, noting small tremors preceded a 5.8-magnitude earthquake in L'Aquila that killed more than 300 people and left 65,000 homeless.