Hawaii Kilauea’s Volatile Lava Flow Returns

Lava flows from hawaii's kilauea volcano into ocean

Sudden cliff collapse highlights danger of Kilauea’s volatile lava flow

Cascading sheets of lava creating explosions where the molten rock hits the sea

Lava Fire Hose in Hawaii Returns for an Encore

The 40,000-Mile Volcano

The Turtle Pits site on the mid-Atlantic Ridge, consisting
of two sulfide mounds and a black smoker chimney.  Center for Marine Environmental Research/University of Bremen, Germany

Credit 

Deep Volcanism:
Oceanographers have inaugurated a deep-sea observatory to study the volcanoes and hydrothermal vents of the Juan de Fuca midocean ridge, a dark ecosystem where the Earth’s tectonic plates are spreading apart.

Source: Midocean Ridges Volcano Underwater