re: 6.2 Quake in Italy

Here's why there are earthquakes in Italy, aside from earthquake attributed to volcanism

Map view of Italy. Notice the plate boundary bordering the eastern coastline of Italy.

That means the plate Italy is on is overriding another (African Plate) and that motion between the overriding plate and downward moving plate is causing the earthquakes.

Here it is from side view. The best scenario is if an earthquake had to occur, it'd happen deep down on the plate interaction, but this one happened very shallow. And the waves didn't dissipate as they traveled through the crust and affected the surface, giving a magnitude of 6.2.