Lava is the form of magma, or molten or semi-molten rock, that erupts to the surface, such as via a volcano or through a crust fracture. We all know lava is pretty hot, but exactly how hot is lava?

Slow magma flows, small chambers, and hot rock all contribute to surprise volcano eruptions that occur without any prior ...

A phreatic eruption was observed at Taal Volcano in Batangas province within the past 24 hours, according to the Philippine ...

Effusive eruptions are the lava flows that snake across the landscape. There are still bubbles, but usually those bubbles can escape the more fluid magma, preventing that molten rock from fragmenting.

The lava that erupts at Hawaii's volcanoes ... At places where two tectonic plates are pulling away from each other, magma — hot, molten rock — can rise from the mantle to the surface, forming ...

The lava is also flowing at shallow depths that ... with the bubbles rising and releasing through the porous rock of the magma cap. "Although we detected a volatile-rich layer, its bubble and ...

The moon was slowly cooling down and running out of steam in its later volcanic stage. Its energy became weak over time.” ...

WASHINGTON — Scientists can't know precisely when a volcano is about to erupt, but they can sometimes pick up telltale signs. That happened two years ago with the world's largest active volcano.

the rock starts to get gooey — a reservoir of solid crystals with a mixture of lava melt and bubbles that form as the magma releases gases. New magma comes in from the bottom of the system.

These additions eventually caused pressure to build up enough that the magma erupted to the surface. In the following eruptions, the lava rocks contained less rhenium, meaning magma was able to ...

A recent satellite image captured a glowing river of lava flowing down the flank of Europe's largest active volcano as it ...