Earth's Mantle

Gravity Map Reveals Tectonic Secrets Beneath Antartica's Ice

Satellite data shows East and West Antarctica have very different geologic histories

The Kilauea volcano’s Halema’uma’u lava lake as it appeared on Monday.

"Explosive" Eruptions Possible at Hawaii's Kilauea Volcano

Steam-powered bursts could fling multi-ton boulders half a mile away, but the USGS says wide-scale destruction is not likely

Yellowstone's Biggest Geyser, Steamboat, Has Trio of Eruptions

It's the first triple eruption in 15 years—but don't worry, it's not a sign the Yellowstone volcano is ready to blow

Earth's Mysterious Hum Recorded in the Deep Sea for the First Time

The discovery could help unlock the planet's deepest secrets

The Cascadia Subduction Zone could unleash "the big one" soon, causing havoc in Seattle.

Slow Earthquakes Are a Thing

Slow earthquakes regularly move more earth than deadly fast quakes, but no one feels a thing

Marie Tharp's map helped vindicate plate tectonics, but her work was initially dismissed as "girl talk."

Seeing Is Believing: How Marie Tharp Changed Geology Forever

Marie Tharp's maps helped prove continental drift was real. But her work was initially dismissed as "girl talk"

Visualization of the giant impact that formed the moon

New Moon-Formation Theory Also Raises Questions About Early Earth

A new model of the impact that created the moon might upend theories about earth, too

"HEY! DID YOU KNOW THAT MACQUARIE ISLAND IS HOME TO SOME OF THE WORLD'S OLDEST ROCKS?" "I DID NOT! WHY ARE WE YELLING?" "I DON'T KNOW, WE'RE SEALS"

Go Deep: 5 Places on Earth to See Seriously Old Rocks

See geology "in action"—or at least as action-packed as rocks can be—at these five spots

San Andreas fault near Parkfield, California

Tides Trigger Tiny Earthquakes Along the San Andreas Fault

The spring tides trigger small tremors deep in the fault, revealing the fault's structure

Rough diamonds from the Juina region of Brazil.

Diamonds Illuminate the Origins of Earth's Deepest Oceans

Crystals could be the key to where our water came from, and what that means for finding life on other planets

What Caused the 2011 D.C. Earthquake?

A thinning mantle led to the 5.8 magnitude shake in the Southeast, and more may be in store

The drill bit that the Atlantis Bank expedition broke near the start of operations. Three of the four "cones" used to dig the hole have snapped off.

A Decades-Long Quest to Drill Into Earth's Mantle May Soon Hit Pay Dirt

Geologists have had to contend with bad luck, budget cuts and the race to the moon in their efforts to drill deep into our planet

An artist's rendition of an asteroid impact.

Largest Asteroid Crater Ever Discovered Underground in Australia

Deep in Earth’s mantle, scientists find evidence of a colossal impact that could reveal new information about Earth’s history

Earth's layers.

What We Can Learn by Digging Up the Secrets of Earth's Deep Carbon

Diamond computers and subsurface life are just some of the topics being investigated by scientists in the Deep Carbon Observatory network

There May Be a Second Massive Ocean Deep Beneath the Surface

Chemically bonded to minerals in the transition zone, Earth's mantle may be rather wet

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