Seismic tremors reveal a shallow fragment of ancient tectonic plate beneath Northern California, helping explain damaging ...

A hidden chunk of an ancient tectonic plate is stuck to the Pacific Ocean floor and sliding under North America, complicating ...

Seismic waves from earthquakes have always offered a window into Earth’s hidden interior. For decades, researchers believed they had a firm grasp on how these waves revealed the rocky mantle’s secrets ...

About 150 million years ago, a massive tectonic mega-plate stretched across the Earth, spanning roughly a quarter of the size of the Pacific Ocean. Its jagged contours ran all the way through the ...

From space, the Iberian Peninsula – primarily occupied by Spain and Portugal – looks like an immovable solid block of land anchoring southwestern Europe. But beneath that apparent stability, the ...

Researchers have detected a previously unknown layer of partially molten rock beneath Earth's crust. The discovery could help scientists learn more about the movements of Earth's tectonic plates, ...

An eons-long collision that created the Himalayas, the world's tallest mountain range, may also be splitting Tibet apart into two pieces, new research suggests. The collision of the Indian and ...