Volcanoes erupt because hot, melted rock from deep inside the Earth finds a way to reach the surface. This melted rock is called magma, and it forms when parts of the Earth’s mantle become so hot that ...

Over the past several months, periods of increased earthquake activity and ground deformation in the summit region of Kilauea volcano indicate that magma is accumulating beneath the surface. Where ...

A Martian volcano once thought to be the result of a single eruption turns out to have a much more complex past. Orbital imaging and mineral data show it developed through multiple eruptive phases, ...

A massive, iron-rich structure sitting at the base of Earth’s mantle beneath the Hawaiian Islands may be doing more than ...

How do volcanoes work? What happens beneath their surface? What causes the vibrations—known as tremor—that occur when magma or gases move upward through a volcano's conduits? Professor Dr. Miriam ...

Scientists are planning to drill into an Iceland volcano in the hunt for near-unlimited energy. The project, helmed by the Krafla Magma Testbed (KMT) organization, is set to start drilling into a ...

The land around a strange volcano in Tanzania is bulging, suggesting magma may be accumulating in a shallow reservoir beneath the surface. The movement could be a precursor to an eruption, researchers ...

Researchers traced tremor signals deep inside Tanzania’s Oldoinyo Lengai volcano, pinpointing their 3D locations for the first time. The study revealed linked tremors at different depths, offering a ...

Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. Studying the molten rock simmering about 12 miles below the Earth ...

Like fortune tellers who peer into a crystal ball for insight, volcanologists at the USGS Hawaiian Volcano Observatory peer into the tiny crystals contained in lava flows to learn about the magma’s ...