MOUNT VESUVIUS
The Vesuvius volcano did not form overnight, of course. In fact, scholars say that the mountain is hundreds of thousands of years old and had been erupting for generations. In about 1780 B.C., for example, an unusually violent eruption (known today as the “Avellino eruption”) shot millions of tons of superheated lava, ash and rocks about 22 miles into the sky. That prehistoric catastrophe destroyed almost every village, house and farm within 15 miles of the mountain.
But it was easy to overlook the mountain’s bad temper in such a pleasant, sunny spot. Even after a massive earthquake struck the Campania region in 63 A.D.–a quake that, scientists now understand, offered a warning rumble of the disaster to come–people still flocked to the shores of the Bay of Naples. Pompeii grew more crowded every year.