The Hawaiian Volcano Observatory is part of the U.S. Geological Survey, the science agency of the U.S. Department of Interior. Our job is to obtain and share science-based information about the ...

Tephra is the Greek word for ash, and it is the label we use for rocks that come flying out of the volcano during an eruption. Every feature of every single tephra grain has something significant to ...

A giant mound near the Moon’s south pole appears to be a volcanic structure unlike any other found on the lunar surface, according to new research. The formation, known as Mafic Mound, stands about ...

It is rare that the birth of an island can be watched by humans in real-time, but that could be what is happening in Spain's Canary Islands. Residents of La Restinga on the island of El Hierro were ...

New details about the crust on Venus include some surprises about the geology of Earth's hotter twin, according to new research that describes movements of the planet's crust. Researchers from Japan ...

A decrease in seismic activity while magma continues to accumulate underground in Iceland has left scientists unsure of what may happen next, including whether an eruption would occur in the area they ...

In a groundbreaking study, scientists have revealed that supervolcanoes may erupt far more suddenly than previously thought—raising serious concerns about global volcanic risks. Researchers focused on ...