This graphic shows the Hana Ridge, part of the east rift zone of Haleakala, extending out into the Pacific Ocean. It also illustrates the undersea geography of Maui Nui, which began with eruptions ...

Here's what happens when underwater volcanoes erupt after scientists issue a warning regarding an upcoming blast.

Where continents rift apart, new crust is formed from upwelling magma. Eventually, a new ocean basin forms. In this web focus we present opinion pieces, along with research and overview articles ...

But in Iceland, the mountain range comes above the ocean certain due to "an excessively high production of magma in that area," Algeo said. Iceland's western rift zone, also known as the Reykjanes ...

The boat ramp — the ocean access for boaters in Puna — was rendered unusable in 2018 when lava from Kilauea’s Lower East Rift Zone eruption raised a sandbar in front of the ramp. Since then ...

This is U.S. Geological Survey aerial view shows the lower East Rift Zone during Kilauea volcano ... in this case, toward the ocean — appears to have greatly diminished since the quake ...