Tephra formed by lava fountains during the ongoing Kīlauea summit eruption has created a new puʻu, or hill, southwest of ...

Mount Shasta, a steep-sided Cascade Range stratovolcano in Northern California, looms above Little Glass Mountain, a thick obsidian flow erupted from the Medicine Lake shield volcano about 1,000 years ...

After the 1975 earthquake, there was a greater emphasis on monitoring the motion of the south flank. Hawaiian Volcano ...

At 2 a.m. on July 8, 2025, instruments across Washington State picked up an unusual signal from Mount Rainier. Over the following weeks, the volcano generated 10,834 small earthquakes, the largest ...

Two long-dormant “supervolcanoes” on two separate continents appear to be stirring to life. Well, maybe. In recent months, more than a thousand minor earthquakes have rattled the area around the Campi ...

Topographic mapping has been a key component of volcano monitoring for decades, helping scientists to study morphologic changes and predict the paths of lava flows during eruptions. Lidar systems are ...

For the third time since December, a volcano system in southwestern Iceland is erupting. Lava from the eruption engulfed a pipe and cut off a hot water supply to about 30,000 people across Reykjanes ...

An "unusually large" ice volcano in Iceland could be about to blow after more than 130 earthquakes hit the region in a five-hour period, experts say. The earthquake swarm began in the northwestern ...

The submerged coconut grove at Halapē in Hawaiʻi Volcanoes National Park marks the former coastline that was inundated during the ground movement associated with the Nov. 29, 1975, magnitude-7.7 ...