HONOLULU (AP) — Lava is shooting 100 feet to 200 feet (30 to 60 meters) into the air as Hawaii’s Mauna Loa, the world’s largest active volcano, erupts for the first time in nearly 40 years. For now, ...

On the flanks of Washington State Mount Rainier, a spike in seismic rumbling has revived an old, unsettling question for the Pacific Northwest: what happens when the region’s most dangerous volcano ...

A submarine eruption north of Papua New Guinea may be building new land while satellites track its evolution from above.

The explosiveness of a volcanic eruption depends on how many gas bubbles form in the magma—and when. Until now, it was thought that gas bubbles were formed primarily when the ambient pressure dropped ...

It's a truism among oceanographers that there is more accurate mapping of the surface of the moon and Mars than of the deep-ocean floor. That's especially true for the Bismarck Sea, a relatively deep ...