Bathymetry of a known caldera, Niuatahi, in the Tongan archipelago. (NOAA Vents Program) Deep beneath the ocean waves, ...

Submarine volcanoes, volcanic structures hidden beneath the ocean surface, play a vital role in shaping Earth’s geology and marine ecosystems. Formed through tectonic plate movements, rising magma, ...

Add Yahoo as a preferred source to see more of our stories on Google. A recent earthquake swarm at Mount Rainier in Washington state, along with increased volcanic activity in Alaska, Oregon, and ...

We've gone to the bottom of the ocean to study how its chemistry shapes our planet's climate, even chasing lava-spewing underwater volcanoes to do it. But it turns out we may have missed something far ...

A powerful swarm of earthquakes in January suggested one of Iceland’s giant “ice volcanoes” may be awakening after a decade of slumber. In the months that followed, more earthquakes have rocked the ...