Results 21 to 30 of about 324 (124)

Subducting Slab Thermo‐Petrologic Structure and Intermediate‐Depth Supra‐Slab Earthquakes Beneath Southern Colombia

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract We develop 2‐D thermo‐petrologic models for two transects through southern Colombia and compare the model‐predicted temperature distributions and depths of slab dehydration with seismological observations. Along the northern transect, earthquakes occur above the relatively young subducting Nazca slab at 80–160‐km depths.
Benjamin M. Knott‐Byars, Ikuko Wada, Brandon T. Bishop, Linda M. Warren, Sungwon Cho   +4 more
wiley   +1 more source

Tectonics and Sliver Motion in Costa Rica: Strain Partitioning Constrained by GNSS Velocities Data

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract The tectonic deformation of Costa Rica is controlled by the subduction of the Cocos Plate beneath the Caribbean Plate and the Panama microplate along the Middle America Trench, with oblique convergence in northern Costa Rica to 2024 from 154 permanent stations distributed across Costa Rica to derive for the first time spatially continuous ...
P. Boymond, C. Muller, M. Protti, E. Chaves   +3 more
wiley   +1 more source

Flux and Isotopic Composition of Sedimentary Carbon Subducting Along the World's Trenches

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract Here we provide comprehensive estimates for the subducted sedimentary flux of inorganic and organic carbon and δ13C at 16 trench segments worldwide. Our calculations provide minimum (incoming sediment), maximum (trench fill) and best estimates (underthrust) of carbon fluxes.
Terry Plank, Alberto Malinverno
wiley   +1 more source

Relative Sea‐Level Change, Tidal Evolution and Energy Dissipation Across the Patagonian Shelf Since the Last Glacial Maximum

Paleoceanography and Paleoclimatology, Volume 41, Issue 5, May 2026.
Abstract Tides play a key role in regulating shelf‐sea environments, influencing sediment dynamics, habitat distribution, long‐term carbon burial, coastal hazards, and water quality, with important socio‐economic consequences. Yet the long‐term evolution of shelf sea tides in response to sea‐level change remains poorly understood. We have developed the
S. L. Ward, S. L. Bradley, S‐B. Wilmes, Z. A. Roseby, J. A. M. Green, P. E. Robins, C. M. Roberts, J. D. Scourse   +7 more
wiley   +1 more source

Detection and Modeling of Co‐Seismic Ionospheric Disturbances Induced by the 2024 Mw 6.6 Deep‐Focus Earthquake in Brazil

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract On 20 January 2024, a deep‐focus earthquake (Mw 6.6, depth 607 km) struck near Tarauacá, Brazil, within the subducted South America Nazca Plate. Although it produced no surface damage, the event generated clear co‐seismic ionospheric disturbances (CSIDs) detectable in GNSS‐based Total Electron Content (TEC) data from the Brazilian RBMC network.
Oluwasegun M. Adebayo, Esfhan A. Kherani, Alexandre A. Pimenta, Saul A. Sanchez   +3 more
wiley   +1 more source

Multi‐Proxy Thermal History of Basin Heating During Cordilleran Orogenesis in the Magallanes‐Austral Retroarc Foreland Basin, Patagonian Andes

Basin Research, Volume 38, Issue 3, May–June 2026.
Paleogene unconformity development from ~64 to 22 Ma for the Magallanes‐Austral retroarc foreland basin (MAB). Schematic shows (A) MAB foreland subsidence and basin infilling, (B) onset of cooling and basin inversion as subducting plate shallows, (C) continued foreland uplift, erosion and cooling as the oblique Farallon‐Phoenix ridge subducts beneath ...
Rebecca A. VanderLeest, Julie C. Fosdick, Theresa M. Schwartz, Ethan G. Hyland, Maria Mastalerz   +4 more
wiley   +1 more source

Slab Dehydration Observed Down to Lower Seismicity Plane Depths in the Northern Chile Subduction Zone

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract We present a high‐resolution local earthquake tomography model that constrains the distribution of hydration and dehydration processes within the subducting Nazca slab beneath Northern Chile. We image a distinct downdip transition from high Vp/Vs (∼1.75) over low Vp/Vs (∼1.65) to a homogeneously high Vp/Vs slab at depths of ≥ ${\ge} $85 km ...
Nazia Hassan, Christian Sippl
wiley   +1 more source

Structure of the North‐Central Chile Subduction Zone From Local Earthquake Tomography

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract The fluid cycle in subduction zones prescribes large parts of its structure and seismogenic behavior. Background seismicity inside the downgoing slab is linked to fluid release from dehydration reactions, whereas fluid overpressure along the plate interface can alter interplate coupling, megathrust earthquakes, and the presence or absence of ...
Nicolás Hernández‐Soto, Christian Sippl, Matthew Miller, Dietrich Lange, Frederik Tilmann, Diego González‐Vidal, Juan Carlos Baez, Anne Socquet, Marcos Moreno   +8 more
wiley   +1 more source

Variable Oceanic Crust Accretion at a Slow‐Spreading Ridge: A Vp/Vs Ratio Evidence Across the Southwest Sub‐Basin of the South China Sea

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract The opening of the Southwest Sub‐basin (SWSB) of the South China Sea was slow‐spreading and has been propagated toward the southwest. Yet, the structural variability and magmatic accretion process of the SWSB are still enigmatic. Here, utilizing a wide‐angle seismic profile traversing the central segment of the SWSB, we obtain detailed S‐wave ...
Ye Yuan, Yuhan Li, Yongjian Yao, Minghui Zhao, Jiazheng Zhang, Enyuan He, Lianjun Li   +6 more
wiley   +1 more source

Lithospheric delamination as the driving mechanism of intermediate-depth seismicity in the Bucaramanga Nest, Colombia. [PDF]

Sci Rep, 2023
Pérez-Forero D, Koulakov I, Vargas CA, Gerya T, Al Arifi N.   +4 more
europepmc   +1 more source