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Earth’s interior

A landscape of dark volcanic rocks forefronts a beautiful blue ocean.
Posted inNews

Leaky at the Core

Jon Kelvey, Science Writer by Jon Kelvey 23 September 201920 April 2022

New evidence from deep mantle plumes suggests that Earth’s liquid outer core might be leaking tungsten isotopes into the lower mantle.

Structure of hydrous eutectic silicate melts at different temperatures and pressures
Posted inEditors' Highlights

Hiding Deep Hydrous Melts at the Core-Mantle Boundary

by S. D. Jacobsen 13 September 201922 December 2021

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.

Graph showing the possible melting curve of hydrogen-bearing iron peroxide
Posted inEditors' Highlights

The Lower Mantle May Have a Wet Bottom

by S. W. Parman 6 August 201912 October 2021

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.

Portrait of a smiling white woman in the woods
Posted inNews

Louise H. Kellogg (1959–2019)

by B. Romanowicz and M. Billen 27 June 201928 March 2023

Louise Kellogg, an influential solid Earth geodynamicist and leader of the geoscience community, passed away in April.

A team of Afghan and U.S. scientists install a continuous GPS instrument
Posted inNews

The Blob Causing Earthquakes

Lucas Joel by L. Joel 10 May 201919 October 2021

Geophysicists discover that a “blob” of rock sinking into the mantle is the force triggering earthquakes in the Hindu Kush.

A 1970 nuclear test at Mururoa atoll, French Polynesia
Posted inEditors' Vox

Measuring Explosive Events on Earth from the Ionosphere

by C. Y. Huang, J. F. Helmboldt, J. Park, T. R. Pedersen and R. J. Willeman 12 April 201919 October 2021

Natural and manmade explosive events occurring on or below the Earth’s surface can be measured remotely in different ways and different places from the ionosphere.

The plumes of Enceladus
Posted inOpinions

Looking Down to Reach to the Stars

by B. Sherwood Lollar 21 March 201912 November 2021

Discoveries deep beneath Earth’s surface drive planetary exploration, and discoveries on other planets inform our understanding of the world beneath our feet.

The rough Cullinan Diamond
Posted inResearch Spotlights

Explaining the Genesis of Superdeep Diamonds

by Terri Cook 12 March 201923 December 2021

Real-time tracking during diamond anvil cell experiments indicates reaction rates may control the unusual depth distribution of the extremely rare diamonds that form deep within Earth’s mantle.

Posted inEditors' Highlights

Seismic Anisotropy Due to a Compositionally Layered Mantle

by B. S. G. Almqvist 8 March 20194 October 2022

Investigating the role of layered rocks and compositional banding on mineral scale in generating seismic anisotropy in the mantle.

Artist’s depiction of a newly forming solar system, which preserves conditions of its birth in isotopes and their ratios for billions of years
Posted inFeatures

Isotope Geochemists Glimpse Earth’s Impenetrable Interior

Lucas Joel by L. Joel 1 March 20195 January 2022

Painstaking measurements of isotopes and their relative abundance in rocks have illuminated the hidden inner Earth and our planet’s origins and shadowy past for much of the preceding century.

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Features from AGU Journals

RESEARCH SPOTLIGHTS
Geophysical Research Letters
“Neural Networks Map the Ebb and Flow of Tiny Ponds”
By Sarah Derouin

EDITORS' HIGHLIGHTS
Community Science
“Collaboration Helps Overcome Challenges in Air Quality Monitoring”
By Muki Haklay

EDITORS' VOX
Reviews of Geophysics
“What We Know and Don’t Know About Climate Tipping Elements”
By Seaver Wang

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