A new tomographic method based on correlations of seemingly chaotic earthquake coda waves yields otherwise unobservable arrivals, thus greatly improving illumination of the deep Earth.
Earth’s core
Posted inEditors' Highlights
Thermal Convection Can Power the Geodynamo
New high-pressure experiments on fluid iron suggest thermal convection without compositional buoyancy is sufficient to drive the dynamo generating Earth’s magnetic field.
Posted inNews
Leaky at the Core
New evidence from deep mantle plumes suggests that Earth’s liquid outer core might be leaking tungsten isotopes into the lower mantle.
Posted inEditors' Highlights
Most Southern California Mainshocks Follow Foreshocks
New research using a highly complete earthquake catalog shows that 72% of M4+ mainshocks are preceded by foreshocks, implying that foreshock activity is much more prevalent than previously thought.
Posted inEditors' Highlights
Hiding Deep Hydrous Melts at the Core-Mantle Boundary
Silicate melts containing H2O in the lowermost mantle are surprisingly dense and may stagnate there, trapping primordial volatiles and potentially causing some of the ultra-low velocity zones.
Posted inEditors' Highlights
The Lower Mantle May Have a Wet Bottom
Molecular dynamics calculations suggest that molten hydrogen-bearing iron peroxide (FeO2Hx) may produce the ultra-low velocity zones that occur at the core-mantle boundary.
Posted inNews
New Model Shines Spotlight on Geomagnetic Jerks
Scientists get one step closer to being able to predict jerks—notoriously capricious changes to Earth’s geomagnetic field detectable by satellites.
Posted inNews
Paleomagnetic Data Hint at Link from Earth’s Core to Continents
Earth’s magnetic field waxes and wanes as supercontinents form and break up, suggests a new study postulating a direct connection between our planet’s crust and its core.
Posted inScience Updates
Earth's Wobbly Path Gives Clues to Its Core
Understanding the Earth Core and Nutation; Brussels, Belgium, 19–21 September 2016
Posted inResearch Spotlights
Which Geodynamo Models Will Work Best on Next-Gen Computers?
A new study uses identical tests to evaluate the accuracy and performance of current models of Earth's magnetic field, then extrapolates the results to anticipated "petascale" supercomputers.