Results 91 to 100 of about 35,358 (192)
Journal of Geophysical Research: Solid Earth, Volume 130, Issue 7, July 2025.Abstract Dense volcanic granular flows are polydisperse in terms of grain size and density, and their flow characteristics are mainly governed by particle‐particle collisions and frictional forces acting at the boundaries. The parameter measuring the energy dissipation during the collisions is the coefficient of restitution (e $e$), which is ...
Francesco Neglia +5 more
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Journal of Geophysical Research: Solid Earth, Volume 130, Issue 7, July 2025.Abstract The dispersion and sedimentation of volcanic ash (i.e., tephra with diameter < ${< } $ 2 mm) represents a significant threat to many economic sectors and transport infrastructures (e.g., aviation, road network). Several field observations have shown that volcanic ash particles often sediment collectively in the form of aggregates and/or within
Jonathan Lemus +4 more
wiley +1 more source
Journal of Geophysical Research: Planets, Volume 130, Issue 7, July 2025.Abstract We investigate the melt production of planetary impacts as a function of planet size (R/REarth $R/{R}_{\text{Earth}}$ = 0.1–1.5), impactor size (L $L$ = 1–1,000 km), and core size ratio (Rcore/R ${R}_{\text{core}}/R$ = 0.2–0.8) using a combination of parameterized convection models and fully dynamical 2D impact simulations.
Lukas Manske +6 more
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Geochemistry, Geophysics, Geosystems, Volume 26, Issue 7, July 2025.Abstract Estimates of magmatic storage are typically made using mineral assemblages in natural samples, experiments and thermodynamic models (e.g., MELTS), where each method has limitations. Here, we compare each of these methods to assess their utility in estimating storage conditions for post‐collapse, two‐feldspar high‐silica rhyolites (HSRs ...
Magdalen A. Grismer +3 more
wiley +1 more source
Journal of Geophysical Research: Space Physics, Volume 130, Issue 7, July 2025.Abstract The study of solar and geomagnetic activity effects on the D‐region ionosphere (60–90 km altitude) using signals from very low frequency and low frequency (VLF, 3–30 kHz) transmitters has garnered considerable attention over the past decades. This research investigates the impacts of the geomagnetic storm (GMS) of 23–24 March 2023, utilizing ...
Muyiwa P. Ajakaiye +2 more
wiley +1 more source
Investigating Magnetic Field Fluctuations in Jovian Auroral Electron Beams
Journal of Geophysical Research: Space Physics, Volume 130, Issue 7, July 2025.Abstract The Juno spacecraft provides a unique opportunity to explore the mechanisms generating Jupiter's aurorae. Past analyses of Juno data immensely advanced our understanding of its auroral acceleration processes, however, few studies utilized multiple instruments on Juno in a joint systematic analysis.
A. Salveter +6 more
wiley +1 more source
Journal of Geophysical Research: Space Physics, Volume 130, Issue 7, July 2025.Abstract The influence of typhoons on the ionosphere has been mentioned in many studies, while the relationship and coupling processes remain elusive. Here, we report findings on concentric ionospheric disturbance (CIDs) during typhoon Talim and Doksuri, using the total electron content (TEC) data derived from the Global Navigation Satellite System ...
Junxian Fu, Yuichi Otsuka, Hidekatsu Jin
wiley +1 more source
Magnetic Field Dynamics in MAAX Satellite's Circular Polar Orbit: A Magnetic Model Comparison
Journal of Geophysical Research: Space Physics, Volume 130, Issue 7, July 2025.Abstract Motivated by the unique high‐altitude polar orbit of the NASA Magnetosphere Auroral Asymmetry eXplorer (MAAX) mission and its Magnetometer Array Distributed on MAAX (MADMAAX), we examine the high‐altitude magnetic field environment and its response to solar wind conditions. Using a data set from the Polar satellite magnetometer, we investigate
Sanjay Kumar, Mark B. Moldwin
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Journal of Geophysical Research: Planets, Volume 130, Issue 7, July 2025.Abstract CO2 ${\text{CO}}_{2}$ ice clouds are important for polar energy balance and the carbon dioxide cycle on Mars. However, uncertainties remain regarding their physical and radiative properties, which control how polar CO2 ${\text{CO}}_{2}$ clouds interact with the global Martian climate.
R. W. Stevens +3 more
wiley +1 more source
Journal of Geophysical Research: Planets, Volume 130, Issue 7, July 2025.Abstract Volcanic glass beads on the Moon have traditionally been thought to only record volatile loss during pyroclastic eruptions. However, recent discoveries have shown that lunar orange glass beads, representing primitive high‐Ti basalts, experienced both outgassing and in‐gassing of volatile elements such as Na, K, Cu, and S.
Xue Su +3 more
wiley +1 more source