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subduction

Diagram from the paper.
Posted inEditors' Highlights

Crustal Melts at the Core-Mantle Boundary

by Thorsten Becker 13 August 202412 August 2024

Seismic waves get sent in all directions for deep mantle anomalies, and a new analysis shows where those scatters lie and what properties they have.

Aerial image of a gray volcano topped with snow emitting a large cloud of gray smoke. The volcano is surrounded by dark blue water.
Posted inResearch Spotlights

How Mantle Hydration Changes over the Lifetime of a Subduction Zone

Aaron Sidder, freelance science writer by Aaron Sidder 19 July 202418 July 2024

Water released from subducting oceanic plates influences the formation of volcanoes and earthquakes on Earth’s surface. A new study simulates how slab dehydration and mantle hydration levels change over time.

Graph from the paper.
Posted inEditors' Highlights

Repeated Coseismic Uplift Above the Patton Bay Splay Fault, Alaska

by Daniel Melnick 30 May 20243 June 2024

Stratigraphic and diatom analyses suggest ruptures of the Patton Bay splay fault occurred together with half of the documented great Alaskan megathrust earthquakes during the past 4,200 years.

An artist’s depiction of Earth split into two. On the left side is Earth early in its history, being struck by another planetary body in a fiery impact. On the right is Earth today, with a smooth surface, mantle plumes, and a moon.
Posted inResearch Spotlights

Earth’s Subduction May Have Been Triggered by the Same Event That Formed the Moon

Rachel Fritts, Science Writer by Rachel Fritts 20 May 202420 May 2024

The giant impact that formed the Moon may also have led to extrastrong mantle plumes that enabled the first subduction event, kick-starting Earth’s unique system of sliding plates.

Coastline with tall cliffs
Posted inNews

Earthquakes Can Trigger Megathrust Slip in Cascadia

by Caroline Hasler 8 April 20248 April 2024

A 2022 earthquake in Northern California may have triggered slow slip in the Cascadia Subduction Zone, according to a new study.

Map of central Mexico with symbols indicating plate movement.
Posted inEditors' Highlights

Forecasting Earthquake Ruptures from Slow Slip Evolution

by Marcos Moreno 2 April 20241 April 2024

A new generation of physics-based models that integrate temporal slip evolution over decades to seconds opens new possibilities for understanding how large subduction zone earthquakes occur.

A mountain with alternating stripes of greenery and bare beige rock. There is a point in the middle of the rock where the stripes change direction, indicating a fault propagation fold.
Posted inResearch Spotlights

Uncovering Earthquake Evidence in Azerbaijan’s Greater Caucasus Mountains

by Rebecca Owen 27 March 202418 June 2024

A new study unearths geological evidence that corroborates historical accounts of large earthquakes along the Kura fold-thrust belt.

A map showing the elevations of land and ocean floor around the Mariana Trench, a subduction zone in the Pacific Ocean. The trench is shown by the lowest elevations of nearly 11,000 meters (36,000 feet) deep at the southern end.
Posted inResearch Spotlights

The Nature of Mantle Flow May Depend on the Type of Slab Subducting

Sarah Derouin, Science Writer by Sarah Derouin 23 February 202423 February 2024

Researchers tease apart the links between slabs and mantle flow near subduction zones, upending some traditional views of subduction-induced mantle flow.

Satellite image of Honshu Island
Posted inResearch Spotlights

Plate Boundaries May Experience Higher Temperature and Stress Than We Thought

Aaron Sidder, freelance science writer by Aaron Sidder 21 February 202421 February 2024

Surface heat flux data shed light on conditions deep below Earth’s surface, at a tectonic plate interface where major earthquakes initiate.

Una vista de la Space Needle de Seattle y sus alrededores con una bahía al fondo.
Posted inNews

Revolucionando la ciencia de los terremotos en Cascadia

by Caroline Hasler 7 November 20237 November 2023

Un nuevo centro reunirá a científicos de sismos para estudiar la zona de subducción de Cascadia y aclarar los peligros sísmicos.

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