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subduction

A model shows yellow mantle plumes rising from big, red lower-mantle basal structures.
Posted inNews

Blame It on the BLOBs

by Bill Morris 15 August 202514 August 2025

For decades, scientists have suspected that large volcanic eruptions have their origins in two mysterious massive regions at the base of our planet’s mantle. Now, it’s been statistically proven.

An orange, soccer ball–sized sphere with electronic equipment attached to it floats in the ocean.
Posted inResearch Spotlights

Finding the Gap: Seismology Offers Slab Window Insights

Sarah Stanley, Science Writer by Sarah Stanley 15 August 202514 August 2025

Studying slow tremors has helped researchers home in on the youngest part of the Chile Triple Junction’s gap between subducting plates, which offers a window to the mantle.

Diagram from the study.
Posted inEditors' Highlights

The State of Stress in the Nankai Subduction Zone

by Alexandre Schubnel 4 August 202531 July 2025

The Nankai subduction zone, in southern Japan, has hosted several large magnitude 8+ earthquakes during the last three hundred years. But, how stressed is it right now? 

7 models showing subducting slabs.
Posted inEditors' Highlights

Shedding Light on the Mysteries of Deep Earthquakes

by Alberto Montanari 26 June 202526 June 2025

By analyzing forty deep earthquakes around the world, researchers discover the key role of a dual mechanism that allows earthquakes to grow larger and release more stress.

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.

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