Studying tree rings helped scientists pinpoint when Mount Rainier last sent a lahar down its steep slopes, which could help ...

Rivers of lava flowed down several vents of the Halemaʻumaʻu crater on Hawaii's Kilauea volcano overnight Monday — the latest ...

Kīlauea summit region shook for 5 hours Nov. 14 that year as magma made a path to the surface. The eruption began at 8:08 p.m ...

It's been nearly four years since a massive volcanic explosion rocked the Pacific nation of Tonga. The eruption created a ...

An earthquake swarm 35 miles (55 kilometers) beneath Kilauea in August 1959 was followed in October by ground swelling ...