A massive supervolcano erupts beneath a modern city built along the crater edge. The ground splits open, skyscrapers breaking apart as rivers of lava burst through the streets. The eruption launches enormous fireballs into the sky while shockwaves shatter windows across the city. Camera sweeps low through erupting fissures and collapsing buildings as volcanic ash darkens the sky. Supervolcano city destruction, lava rivers through downtown, explosive eruption physics, cinematic firestorm lighting, 4K.