Geology

Italy’s Campi Flegrei volcano has caused thousands of recent earthquakes and pushed up the ground, worrying 1.3 million residents

Helium gas may be seeping from Earth’s core, say scientists who found extremely high helium isotope ratios in lavas on Baffin Island

Our planet’s crust has been shifting and sliding for four billion years, a new study suggests

An enormous magma intrusion under Iceland’s Reykjanes Peninsula is causing earthquake swarms and forcing evacuations

Egypt’s famous Sphinx may have originated as a rock feature carved by erosion that ancient Egyptians further refined into the iconic monument

A preserved river landscape from the time before Antarctica was icebound persists more than a mile below the East Antarctic Ice Sheet

A long-lost tectonic plate dubbed “Pontus” that was a quarter of the size of the Pacific Ocean was discovered by chance by scientists in Borneo

Washington State’s Puget Sound could face previously unknown earthquake risks, according to a new study that has pinned down the date of an ancient earthquake using tree rings and the radiation left by a mysterious cosmic force

Western Australia’s Argyle Mine is famous for its rare pink diamonds, and scientists now think they know how these formed: a tectonic collision followed by the breakup of a supercontinent

Researchers have discovered a pattern where diamonds spew from deep beneath Earth’s surface in huge, explosive volcanic eruptions

Researchers have found a subtle signal that occurs two hours before major quakes, hinting that earthquake prediction is inching closer to possibility

Satellites and other technologies are spurring a new revolution in volcanic activity monitoring