Results 81 to 90 of about 392,695 (199)

Megacrystals track magma convection between reservoir and surface [PDF]

, 2015
International audienceActive volcanoes are typically fed by magmatic reservoirs situated within the upper crust. The development of thermal and/or compositional gradients in such magma chambers may lead to vigorous convection as inferred from theoretical
Kimball, Christine, Kyle, Philip, Scaillet, Bruno, Buisman, Iris, Burgisser, Alain, Oppenheimer, Clive, Ian Schipper, C., Moussallam, Yves, Schipper, C. Ian, Dunbar, Nelia, Andújar, Joan   +10 more
core   +2 more sources

Asymmetric magma plumbing system beneath Axial Seamount based on full waveform inversion of seismic data

Nature Communications
The architecture of magma plumbing systems plays a fundamental role in volcano eruption and evolution. However, the precise configuration of crustal magma reservoirs and conduits responsible for supplying eruptions are difficult to explore across most ...
Jidong Yang, Hejun Zhu, Zeyu Zhao, Jianping Huang, David Lumley, Robert J. Stern, Robert A. Dunn, Adrien F. Arnulf, Jianwei Ma   +8 more
doaj   +1 more source

Characterizing Incoming Cocos Plate Structure Outboard of the Guerrero Gap and Adjacent Segments Offshore Mexico: Implications for Along‐Strike Variations in Megathrust Slip Behavior

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 9, September 2026.
Abstract Megathrust slip behavior in subduction zones can vary along‐strike, yet the mechanisms driving this variability remain uncertain. The Middle America trench offshore Mexico provides an ideal setting to investigate the structural controls on megathrust slip behavior.
Davis Hagemeier, Anne Bécel, Tanner Acquisto, Víctor M. Cruz‐Atienza, Brandon Shuck, Donna J. Shillington, Shuoshuo Han, Brian Boston, Jorge A. Real, Yoshihiro Ito, Grace Ward   +10 more
wiley   +1 more source

Fault slip and Coulomb stress variations around a pressured magma reservoir : consequences on seismicity and magma intrusion

, 2006
International audiencePressure variations in a magma reservoir may cause deformation at the surface and a redistribution of the stress in the surrounding rock.
Gargani, Julien
core   +1 more source

Geofluid mapping reveals the connection between magmas, fluids, and earthquakes

Communications Earth & Environment
Subsurface geofluids drive Earth’s evolution through seismogenesis, volcanism, and plate motion. Previous geofluid-distribution estimates from various geophysical methods show large variations.
Hikaru Iwamori, Yasuo Ogawa, Tomomi Okada, Tohru Watanabe, Hitomi Nakamura, Tatsu Kuwatani, Kenji Nagata, Atsushi Suzuki, Masahiro Ichiki   +8 more
doaj   +1 more source

Implications of Thermal Weakening and Magma Compressibility for Volcano Monitoring

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Magmatic intrusion and volcanic deformation are traditionally approximated with an inflating cavity in an elastic halfspace. Various analytical models predict surface displacement as a function of pressure or volume change, depth, and elastic crustal properties.
A. Spang, A. Piccolo, M. Gerbault, B. J. P. Kaus, M. Thielmann   +4 more
wiley   +1 more source

Lava production at Soufriere Hills Volcano, Montserrat: 1995-2009 [PDF]

, 2010
[1] We estimate that about 1 km3 of andesitic lava has been produced at Soufrière Hills Volcano, Montserrat from 1995 to 2009. There were three major episodes of extrusion, each lasting about 2 to 3.5 years and producing about 280 to 340 M m3 of lava ...
Calder, E. S., Herd, R, Komorowski, J-C, Komorowski, JC, Calder, E.S., Wadge, Geoffrey, Calder, ES, Komorowski, J. -C., Calder, E. S.; id_orcid, Komorowski, J.-C., Ryan, G., Ryan, Graham, Herd, R., Wadge, G., Wadge, G   +14 more
core   +1 more source

Thermo‐Mechanical Controls on Central‐Vent Caldera Collapse

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Large‐scale magmatic systems are associated with catastrophic caldera‐forming eruptions, posing hazards to millions near active volcanoes. Despite occurring across a range of sizes, the physics driving caldera collapse remain incompletely understood. While large calderas have received considerable attention, moderately sized calderas (∼5–10 km)
Pascal S. Aellig, Albert de Montserrat, Boris J. P. Kaus   +2 more
wiley   +1 more source

Graph Neural Network based elastic deformation emulators for magmatic reservoirs of complex geometries

Volcanica
Measurements of volcano deformation are increasingly routine, but constraining complex magma reservoir geometries via inversions of surface deformation measurements remains challenging.
Taiyi A. Wang, Ian McBrearty, Paul Segall   +2 more
doaj   +1 more source

Role of mechanical erosion in controlling the effusion rate of basaltic eruptions

Geophysical Research Letters, 2016
In many basaltic eruptions, observations show that the effusion rate of magma has a typical dependence on time: the effusion rate curves show first a period of increasing and later a decreasing phase by a maximum value. We present a model to explain this
Antonello Piombo, Andrea Tallarico, Michele Dragoni   +2 more
doaj   +1 more source