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subduction

Two graphs from the study.
Posted inEditors' Highlights

Atomic-Scale Insights into Supercritical Silicate Fluids

by Jun Tsuchiya 30 April 202529 April 2025

Water-induced depolymerization enhances fluid mobility in deep Earth, offering new insights into magma transport and isotope signatures in arc lavas.

Close up view of the surface of dark-colored rock containing several large pale green crystals. The tip of a pen appears beside the rock for scale.
Posted inScience Updates

The Deep Frontier of Mantle Magma Supply

by Ben Black, Samer Naif, Forrest Horton, Andrea Goltz and Cian Wilson 25 March 202525 March 2025

Compared with crustal magma systems, little is known about the deep sources of volcanic supply chains. Interdisciplinary efforts can help answer key questions about how magma migrates from the mantle.

A mostly flat landscape is dotted with mounds, which give way to taller volcanic cones in the background.
Posted inResearch Spotlights

Water Stored in the Mantle for Millions of Years May Be Linked to Continental Volcanism

by Rebecca Owen 19 March 202519 March 2025

New research shows that intraplate volcanism is more likely to occur over areas of the mantle that are more hydrated—particularly those that have been hydrated for a long, long time.

Graph and map from the study
Posted inEditors' Highlights

How (Slow) Earthquakes Get Going

by Thorsten W. Becker 17 March 202517 March 2025

Non-volcanic tremor ramp up precedes slow slip in Cascadia by about a day, indicating that brittle-creeping process interactions control nucleation.

Map from the study.
Posted inEditors' Highlights

Skewed Subduction Shear Zones

by Thorsten W. Becker 20 February 202519 February 2025

A global reanalysis of both short- and long-term deformation clarifies how obliquity affects strain partitioning in convergent plate boundaries.

Cracked and uplifted earth at a fault zone on a vineyard.
Posted inEditors' Highlights

Slow But Powerful Fault Slip Can Simply Arise from Fluid Flow

by Yihe Huang 15 January 202514 January 2025

Cyclic changes of fluid pressure in fault zones can induce slow-slip events that advance in the direction of fluid flow, even when the faults are stable.

A series of fossilized tree stumps sticks up from shallow ocean water on a beach. A tree-topped cliff and blue sky are in the background.
Posted inResearch Spotlights

Modeling the Long and Short of Subduction Zones

by Rebecca Owen 10 January 202517 January 2025

A new subduction model could reveal important insights about megathrust earthquakes.

Orange and yellow lava shoots out of a black mound.
Posted inNews

Hot Spot Lavas Around the World May Have Something in Common

by Bill Morris 23 October 202423 October 2024

A global study of lavas from volcanic hot spots suggests that contrary to accepted wisdom, Earth’s deep mantle may have the same composition throughout. Not everyone is convinced, however.

Two maps with symbols to indicate seismic events.
Posted inEditors' Highlights

Seismotectonic Update of the Philippines-Taiwan Region

by Atalay Ayele 4 October 20243 October 2024

Using more than two decades of data, scientists find that the Philippine and Taiwan subduction region is controlled mainly by shallow seismicity and low magnitude earthquakes.

Diagram from the study.
Posted inEditors' Highlights

Cyclic Opening of Deep Fractures Regulates Plate Boundary Slip

by Brandon Schmandt 24 September 202420 September 2024

Seismic anisotropy changes through time suggest that cyclical opening of fluid-filled fractures is synchronized with subduction zone slow slip events.

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