An underwater volcano near Tonga revealed how sediment spreads, disrupts marine life, and raises questions about deep-sea ...

First came the burnt-match smell of hot sulfur. Then, a roar from below the water. The towering undersea volcano known as Hunga Tonga-Hunga Ha‘apai had awakened, and on a balmy afternoon in ...

About 300 miles off the coast of Oregon, an underwater volcano appears to be rumbling to life.. Scientists who have been monitoring the vast submarine volcano for decades say a flurry of recent ...

The volcano, known as Axial Seamount, is located nearly 1 mile (1.4 kilometers) underwater on a geological hot spot, where searing gushes of molten rock rise from Earth’s mantle and into the crust.