Photo by Eliano IMPERATO / AFP A strong 4.4-magnitude quake hit Italy's volcanic region of Campi Flegrei and the nearby city of Naples on Thursday. But the Campi Flegrei is not the only active volcano ...

Italy's Mount Etna and Mount Stromboli volcanoes erupted in recent days, spewing smoke and ash into the air. These volcanoes are two of the most active in the world — but they are not the only ...