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subduction

River flow paths in Iceland derived from HydroSHEDS.
Posted inAGU News

Charting Paths to New Knowledge

by Heather Goss 20 May 202220 May 2022

In our June issue of Eos, we home in on the unique ways researchers are using maps to better understand Earth and beyond.

A red rock tower in front of a backdrop of cloudy sky
Posted inFeatures

Is Earth’s Core Rusting?

by Jiuhua Chen and Shanece S. Esdaille 25 April 202225 April 2022

If subduction carries hydrous minerals deep into Earth’s mantle, they may “rust” the iron outer core, forming vast sinks of oxygen that can later be returned to the atmosphere.

Perspective plot looking west across the Hikurangi margin (New Zealand) at the 3 km/s S-velocity isosurface contoured in depth.
Posted inEditors' Highlights

Adjoint Tomography Illuminates Hikurangi Margin Complexity

by Michael Bostock 21 April 202226 April 2022

Waveform inversion of regional earthquakes reveals velocity anomalies interpreted as subducting seamounts that control an enigmatic segmentation in plate coupling along the Hikurangi margin.

Dynamic topography in the Banda arc and Weber Deep.
Posted inEditors' Highlights

Transient Mantle Flow Triggers Morphotectonic Activity in Asia

by Claudio Faccenna 8 April 20225 April 2022

Changes in mantle dynamics following the Australian collision in southeast Asia triggered fast and intense morphotectonic activity at the surface.

Tree-lined cliffs and hills rise from a coastal beach where ocean waves gently wash ashore.
Posted inFeatures

Exploring Subduction Zone Geohazards on Land and at Sea

by Mong-Han Huang, Kristin Morell, Alison Duvall, Sean F. Gallen and George E. Hilley 25 March 202220 May 2022

A new initiative is bringing together scientists to address fundamental questions about subduction zone geohazards, using the latest advances in observation technology and computational resources.

Posted inEditors' Highlights

Continent-Scale Detection of Triggered Low Frequency Earthquakes

by Thorsten Becker 10 March 202212 April 2022

Very low frequency events in the gap zone of Cascadia illustrate how stress evolves on megathrusts, advancing our understanding of rupture dynamics.

A beach at As Sifah, Oman
Posted inResearch Spotlights

Radiometric Dating Sheds Light on Tectonic Debate

by Aaron Sidder 21 January 20222 February 2022

The emplacement of the Samail Ophiolite in Oman has been a source of disagreement among geologists. New state-of-the-art research offers a fresh perspective on its timing and geometry.

Image of metamorphic rocks that are found in subduction zones
Posted inResearch Spotlights

Unearthing the Cause of Slow Seismic Waves in Subduction Zones

by Sarah Derouin 9 November 202118 January 2022

Researchers look to the fossil rock record to unearth the driving forces for variable seismic speed through subduction zones.

Diagram of subduction interface
Posted inEditors' Highlights

Subduction Zone Earthquakes: Fast and Slow, Weak and Strong

by T. Parsons 13 September 202118 January 2022

What causes slow earthquakes in subduction zones? New insights from numerical models suggest that a mixture of strong and weak rocks might be the cause.

Dead tree trunks and stumps stand along a shoreline
Posted inScience Updates

Swipe Left on the “Big One”: Better Dates for Cascadia Quakes

by J. K. Pearl and L. Staisch 20 August 202111 May 2022

Improving our understanding of hazards posed by future large earthquakes on the Cascadia Subduction Zone requires advancements in the methods and sampling used to date and characterize past events.

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