Area 51Groom Lake, Nevada查看地震 YellowstoneThe Wyoming supervolcano查看地震 ParkfieldThe "earthquake capital of the world"查看地震 Mount St. HelensWashington’s restless volcano查看地震 The GeysersCalifornia’s geothermal hotspot查看地震 Long Valley CalderaMammoth Lakes, California查看地震 Campi FlegreiItaly’s restless supervolcano查看地震 Mount VesuviusThe volcano that buried Pompeii查看地震 Mount EtnaEurope’s most active volcano查看地震 Mount FujiJapan’s iconic volcano查看地震 Reykjanes PeninsulaIceland’s erupting peninsula查看地震 New MadridThe fault that shook the Midwest查看地震