Results 91 to 100 of about 418,217 (192)

Satellite Geodesy Captures Offset Magma Supply Associated With Lava Lake Appearance at Masaya Volcano, Nicaragua

Geophysical Research Letters, 2018
Ascending and descending Interferometric Synthetic Aperture Radar data sets from various satellites (CSK, RSAT‐2, ALOS‐2, and Sentinel‐1) show a maximum of ∼8 cm ground inflation in Masaya caldera over a 10 month period (6 November 2015 to 1 September ...
K. J. Stephens, C. Wauthier
doaj   +1 more source

Micromechanical Insights Into the Cyclic Behavior of Fault‐Valve Systems

Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.
Abstract Cyclic fluid pressurization can promote repeated fault reactivation and transient permeability changes, a behavior often discussed within the fault‐valve concept in which faults alternate between acting as hydraulic barriers and conduits. To investigate the micromechanical processes involved during fluid induced reactivations, we simulate ...
Oussama Larkem, Luc Scholtès, Fabrice Golfier   +2 more
wiley   +1 more source

Shallow Poroelastic Hydrothermal Deformation at Changbaishan Volcano Before the 2020 Unrest Revealed by Sentinel‐1 InSAR Time Series

Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract Ground deformation of dormant volcanoes provides critical insights into subsurface processes and potential hazards. Here we present Sentinel‐1 Interferometric Synthetic Aperture Radar (InSAR) time series (2015–2020) for Changbaishan volcano, the largest intraplate volcanic system in East Asia. We detect persistent subsidence of up to 3.5 mm/yr
Xingjun Luo, Wenbin Xu, Nicolas Oestreicher, Joël Ruch   +3 more
wiley   +1 more source

Extraction of high-silica granites from an upper crustal magma reservoir: Insights from the Narusongduo magmatic system, Gangdese arc

, 2020
The genesis of high-silica igneous rocks is important for understanding the behavior of shallow magmatic systems. However, although many such studies have focused on the eruption of crystal-poor high-SiO2 rhyolites, the origin of high-silica granites ...
Zhou, Jin-Sheng, Yang, Zhu-Sen, Hou, Zeng-Qian, Wang, Qiang, Zheng, Yuan-Chuan, Wyman, Derek A.   +5 more
core   +1 more source

Magma Differentiation in Dynamic Mush Domains From the Perspective of Multivariate Statistics: Open‐ Versus Closed‐System Evolution

Geochemistry, Geophysics, Geosystems
Open‐conduit conditions characterize several of the most hazardous and active volcanic systems of basaltic composition worldwide, persistently refilled by magmatic inputs. Eruptive products with similar bulk compositions, chemically buffered by continual
A. Pontesilli, F. Di Fiore, P. Scarlato, B. Ellis, E. Del Bello, D. Andronico, J. Taddeucci, M. Brenna, M. Nazzari, O. Bachmann, S. Mollo   +10 more
doaj   +1 more source

Volatile Conduits Beneath Vulcano Island (Italy) Revealed by High‐Resolution Nodal Local Earthquake Tomography During Volcanic Unrest

Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract Understanding shallow magmatic and hydrothermal systems at active volcanoes is essential for interpreting unrest and forecasting eruptions. We present the first high‐resolution three‐dimensional Vp $Vp$, Vs $Vs$, and Vp/Vs $Vp/Vs$ models of Vulcano Island, Aeolian Islands, Italy, derived from a dense nodal seismic network.
Iván Cabrera‐Pérez, Douglas Sami Stumpp, Sofía Castro, Michaïl Henry, Tullio Ricci, Alessandra Sciarra, Matteo Lupi   +6 more
wiley   +1 more source

Tracing Mantle Upwellings Beneath Changbaishan/Mount Paektu: New Insights From Transition Zone Discontinuity Structure

Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract Intraplate volcanism in Northeast Asia, located in a distant back‐arc setting, challenges conventional models of mantle convection and volatile cycling. Using receiver function data from over 300 broadband stations, we image the mantle transition zone (MTZ) beneath the Changbaishan/Paektu volcano.
Cunrui Han, Weiqian Yu, James O. S. Hammond, David P. Dobson, He Tan, You Tian, Wei Wei   +6 more
wiley   +1 more source

Magma-sponge hypothesis and stratovolcanoes : case for a compressible reservoir and quasi-steady deep influx at Soufrière hills volcano, Montserrat

, 2010
We use well-documented time histories of episodic GPS surface deformation and efflux of compressible magma to resolve apparent magma budget anomalies at Soufrière Hills volcano (SHV) on Montserrat, WI. We focus on data from 2003 to 2007, for an inflation
Hidayat, Dannie, Strutt, M., Voight, Barry, Mattioli, Glen, Widiwijayanti, Christina, Elsworth, Derek, Glen Mattioli, Christina Widiwijayanti, Derek Elsworth, Dannie Hidayat, M. Strutt, Barry Voight   +11 more
core   +1 more source

Dense magnetotelluric imaging of the Akan Caldera (Hokkaido, Japan): insights into its magma plumbing system and caldera-forming reservoir

Earth, Planets and Space
To investigate the magma plumbing system beneath the Akan Caldera (Hokkaido, Japan), we conducted broadband magnetotelluric surveys and imaged its three-dimensional resistivity structure to a depth of approximately 30 km.
Tomohiro Inoue, Takeshi Hashimoto, Koki Aizawa, Hiroshi Ichihara, Ryo Tanaka, Yusuke Yamaya   +5 more
doaj   +1 more source

DAMAGE AND STRAIN LOCALIZATION AROUND A PRESSURIZED SHALLOW-LEVEL MAGMA RESERVOIR

, 2019
International audienceStructures developing above long‐term growing shallow‐level magma reservoirs, such as resurgent domes, may contain information on the reservoir itself.
Brothelande, Élodie, Got, Jean-Luc, Peltier, Aline, Amitrano, David, Stefanou, Ioannis, Aline Peltier, David Amitrano, Ioannis Stefanou, Elodie Brothelande, Jean‐Luc Got   +9 more
core   +1 more source