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subduction

Cartoon showing a map view of the top of a subducting plate modeled on present day subduction at Nankai in southwest Japan
Posted inEditors' Highlights

A Mechanism for Shallow, Slow Earthquakes in Subduction Zones

by U. Faul 30 July 202018 January 2022

Slow earthquakes beneath the accretionary prism updip from the locked portion of a subduction zone can be caused by basaltic blocks embedded in a shale matrix.

Shaded relief map illustrating the high topography of the Southern Central Andes and sampling locations used in the study
Posted inEditors' Highlights

What Controlled the Growth of the Southern Central Andes?

by T. Schildgen 15 July 202026 January 2023

Flat-slab subduction appears to have played a minor role in the growth of the Southern Central Andes, with evidence for eastward migrating deformation.

A beach scene along the Oregon coast
Posted inResearch Spotlights

Land Motion Offers Insights into Cascadia Earthquake Cycle

by David Shultz 7 July 202029 September 2021

Comparing recent GPS data with a longer record of sea level along the western coast of North America allows researchers to home in on interseismic deformation above the Cascadia megathrust.

An outcrop of the Franciscan complex on Santa Catalina Island in California, with white quartz veins crosscut by pale beige silicic magmatic dikes
Posted inScience Updates

Modeling Fluid Migration in Subduction Zones

by I. Wada and Leif Karlstrom 16 June 202022 March 2022

Scientists from different disciplines are working together to identify common challenges in and techniques for modeling fluid migration associated with subduction zone processes.

Model of the Nazca slab constrained by continent-scale tomography
Posted inEditors' Highlights

The Other, Deeper, South American Flat Slab

by V. Lekic 6 June 202023 January 2023

Tomographers trace the slab subducting beneath South America into the lower mantle, providing the most complete picture of structure beneath the continent to date.

Map of the Lesser Antilles volcanic arc showing the subduction zone trench and the location of two Deep Sea Drilling Cores
Posted inEditors' Highlights

Extremely High Carbon Return in Certain Volcanic Arcs

by S. D. Jacobsen 3 June 202023 September 2022

By comparing measured volcanic output with subducted carbon fluxes from drill cores, the Lesser Antilles subduction zone shows nearly complete slab carbon release at sub-arc depths.

Drillers in hardhats work on the rig floor of a research vessel.
Posted inNews

Getting to the Bottom of Slow-Motion Earthquakes

Adityarup Chakravorty, freelance science writer by Adityarup Chakravorty 24 April 20202 December 2022

For close to 20 years, slow-motion earthquakes have been an enigma. Core samples provide new clues to their origins.

Illustration of Jupiter’s magnetosphere and innermost planets
Posted inResearch Spotlights

Two Moons and a Magnetosphere

Sarah Stanley, Science Writer by Sarah Stanley 21 April 202018 October 2022

Decades of research have illuminated how Io and Europa shape—and are shaped by—Jupiter’s giant magnetosphere.

The hyperacidic lake inside the crater of Poás volcano in Costa Rica
Posted inScience Updates

Microbial Influences on Subduction Zone Carbon Cycling

by D. Giovannelli, P. H. Barry, J. M. de Moor, K. G. Lloyd and M. O. Schrenk 3 March 202024 October 2022

An innovative collaboration is investigating how geobiological processes alter fluxes of carbon and other materials between the deep Earth and the surface.

Satellite image of the Strait of Juan de Fuca
Posted inNews

Fluid Pressure Changes Grease Cascadia’s Slow Aseismic Earthquakes

Mary Caperton Morton, Science Writer by Mary Caperton Morton 18 February 202019 August 2022

Twenty-five years’ worth of data allows scientists to suss out subtle signals deep in subduction zones.

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