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tomography

Graphic showing ray-path sampling of Earth by the body-wave constituents of the seismic-event coda-correlation
Posted inEditors' Highlights

Earthquake-coda Tomography Boosts Illumination of the Deep Earth

by Andreas Fichtner 28 May 202027 January 2023

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.

Graph showing temperatures in four different depth layers over time
Posted inEditors' Highlights

CAT Pictures of Internal Solitary Waves in Indonesian Strait

by J. Sprintall 7 October 201927 January 2023

Huge and rapid subsurface temperature changes associated with propagating internal solitary waves were observed from a moored coastal acoustic tomography (CAT) system in Lombok Strait in Indonesia.

Photo of twelve gold grains used in this study
Posted inEditors' Highlights

X-Ray Computed Tomography Detects Resolution Scale Gold Grains

by A. Revil 2 May 201928 February 2023

A method combining partial-volume and blurring effects can be used to measure small features in computed tomography data volumes.

Seismic tomography imaging shows a portion of a “blob” that sits at the base of the mantle below Africa.
Posted inFeatures

The Unsolved Mystery of the Earth Blobs

Jenessa Duncombe, Staff Writer by Jenessa Duncombe 27 February 201927 January 2023

Researchers peering into Earth’s interior found two continent-sized structures that upend our picture of the mantle. What could their existence mean for us back on Earth’s surface?

Posted inAGU News

Donald W. Forsyth Receives 2017 Maurice Ewing Medal

by AGU 19 December 201711 April 2023

Donald W. Forsyth was awarded the 2017 Maurice Ewing Medal at the American Geophysical Union Fall Meeting Honors Ceremony, held on 13 December 2017 in New Orleans, La. The medal is for “significant original contributions to the ocean sciences.”

seismology-model-study-subduction-zone-characteristics
Posted inResearch Spotlights

Seismological Models Are Biased, but Scientists Have a Solution

Shannon Hall by S. Hall 26 September 201629 September 2016

Many seismic wave models are based on an erroneous assumption about the Earth's interior. A new technique corrects this by eliminating false signals produced by models.

US crustal thickness map.
Posted inResearch Spotlights

Novel Technique Finds New Features Under United States

by Terri Cook 29 June 201627 January 2023

A new high-fidelity tomography harnesses USArray data to expose a wealth of noteworthy crustal and upper mantle structures, including previously unknown anomalies beneath the Appalachians.

Posted inScience Updates

Extending Recent Seismic Imaging Successes to South America

by K. M. Ward, J. R. Delph and S. L. Beck 28 April 201627 January 2023

Ambient Noise Tomography Workshop (MIMOSA); Tucson, Arizona, 17–23 January 2016

Posted inFeatures

What Lies Deep in the Mantle Below?

by G. R. Foulger, G. F. Panza, I. M. Artemieva, I. D. Bastow, F. Cammarano, C. Doglioni, J. R. Evans, W. B. Hamilton, B. R. Julian, M. Lustrino, H. Thybo and T. B. Yanovskaya 25 August 20154 August 2023

For decades, scientists have probed Earth's remote mantle by analyzing how seismic waves of distant earthquakes pass through it. But we are still challenged by the technique's limitations.

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

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