Results 41 to 50 of about 161 (108)

Weak Crust Owing Past Magmatic Intrusions Beneath Campi Flegrei Identified: The Engine for Bradyseismic Movements?

AGU Advances, Volume 6, Issue 2, April 2025.
Abstract Calderas often experience extended periods of unrest that are challenging to relate to a magmatic or hydrothermal origin, making it crucial to assemble a clear picture of these dynamics. Since 2005, Campi Flegrei caldera (Italy) has experienced accelerating ground uplift, seismicity rates, and degassing.
Gianmarco Buono, Francesco Maccaferri, Lucia Pappalardo, Anna Tramelli, Stefano Caliro, Giovanni Chiodini, Virginie Pinel, Eleonora Rivalta, Elena Spagnuolo, Elisa Trasatti, Mauro Antonio Di Vito   +10 more
wiley   +1 more source

Benefits of GNSS Local Observations Compared to Global Weather‐Based Models for InSAR Tropospheric Corrections Over Tropical Volcanoes: Case Studies of Piton De La Fournaise and Merapi

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 4, April 2025.
Abstract From repeat‐pass interferometry, tropospheric signals often prevent the detection of ground deformation signals. In recent years, tropospheric corrections derived from global weather‐based models have been implemented in several InSAR processing chains.
F. Albino, S. Gremion, V. Pinel, P. Bouygues, A. Peltier, F. Beauducel, J.‐L. Froger, Agus Budi Santoso   +7 more
wiley   +1 more source

The Transition From Jointing to Faulting Observed at the Koa'e Fault Zone, Hawai'i Volcanoes National Park, Hawaii

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 4, April 2025.
Abstract Fractures can exhibit mixed modes of displacement, that is, combinations of displacements parallel and perpendicular to the fracture plane, that make a displacement‐to‐length (Dmax/L) scaling analysis challenging. However, such analysis is important for understanding the propagation and nature of mixed‐mode fracture populations. In this study,
Hiu Ching Jupiter Cheng, Jay Mrazek, Christian Klimczak   +2 more
wiley   +1 more source

Uncertainty Analysis of Remotely-Acquired Thermal Infrared Data to Extract the Thermal Properties of Active Lava Surfaces

Remote Sensing, 2020
Using thermal infrared (TIR) data from multiple instruments and platforms for analysis of an entire active volcanic system is becoming more common with the increasing availability of new data.
James O. Thompson, Michael S. Ramsey
doaj   +1 more source

Inferring Eruption Dynamics From Seismometer Tilt: A Case Study of Erebus and Augustine Volcanoes

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 4, April 2025.
Abstract Broadband seismometers are sensitive to tilt as a consequence of their design. We used broadband data from Erebus volcano on Ross Island, Antarctica, and Augustine volcano in Lower Cook Inlet, Alaska, to make tilt measurements associated with individual volcanic explosions and investigate the near‐terminal magmatic system configuration of each
M. S. Christoffersen, R. Grapenthin, M. Angarita, R. C. Aster, J. Chaput, P. R. Kyle   +5 more
wiley   +1 more source

Modeling Wavelength Dependent Mid‐Infrared (5.5–25 μm) Optical Constants of Silicate Glasses: A Genetic Algorithm Approach

Earth and Space Science, 2023
Wavelength‐dependent mid‐infrared (400–1,800 cm−1; 5.56–25 μm) optical constants (real and imaginary indices of refraction; n and k) are determined using reflectance spectra at a spectral sampling of 4 cm−1 for several silicate glasses of varying SiO2 wt%
I. Varatharajan, E. Sklute, T. D. Glotch, M. D. Dyar   +3 more
doaj   +1 more source

Identifying Landslides in Atla Regio on Venus

Journal of Geophysical Research: Planets, Volume 130, Issue 4, April 2025.
Abstract We performed a systematic search for landslides in the Alta Regio region of Venus, located from (16°S, 179°W) to (21°N, 147°W). Using data primarily from Magellan Cycle 1 radar imagery, we identified 29 landslides in this region. There were 19 previously identified across the entire surface (Malin, 1992, https://doi.org/10.1029/92je01343 ...
E. L. Jesina, L. M. Carter, I. Ganesh
wiley   +1 more source

Explosive Activity on Kīlauea's Lower East Rift Zone Fueled by a Volatile‐Rich, Dacitic Melt

Geochemistry, Geophysics, Geosystems, 2022
Magmas with matrix glass compositions ranging from basalt to dacite erupted from a series of 24 fissures in the first 2 weeks of the 2018 Lower East Rift Zone (LERZ) eruption of Kīlauea Volcano.
Penny E. Wieser, Marie Edmonds, Cheryl Gansecki, John Maclennan, Frances E. Jenner, Barbara Kunz, Paula Antoshechkina, Frank Trusdell, R. L. Lee, EIMF   +9 more
doaj   +1 more source

Fine‐Scale Crustal Velocity Structure at the Lucky Strike Segment of Mid‐Atlantic Ridge From Full Waveform Inversion of Wide‐Angle Seismic Data

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 3, March 2025.
Abstract The Lucky Strike segment at the Mid‐Atlantic ridge, characterized by a well‐defined median valley with a central volcano, is an archetypical slow‐spreading ridge segment and hence an ideal site for studying magmatic and tectonic processes at slow‐spreading ridges.
Zhikai Wang, Satish C. Singh, Timothy A. Minshull, Wayne C. Crawford   +3 more
wiley   +1 more source

Surface‐Wave Relocation and Characterization of the October 2023 Tsunamigenic Seismic Unrest Near Sofugan Volcano, Izu Islands, Japan

Geophysical Research Letters, Volume 52, Issue 3, 16 February 2025.
Abstract A moderate‐magnitude earthquake swarm occurred in the remote Izu Islands region of Japan between October 1 and 8, 2023. The swarm included 151 shallow earthquakes cataloged by the U.S. Geological Survey, which notably included a roughly 2.5‐hr episode of 15 successive magnitude (M) < 5.5 earthquakes.
C. A. Deane, J. D. Pesicek, S. G. Prejean, P. S. Earle, D. R. Shelly, W. L. Yeck   +5 more
wiley   +1 more source