Results 151 to 160 of about 2,895 (251)

Controlling of the F Region Plasma Structures by the E Region Conductance in the Auroral Ionosphere

open access: yesGeophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract At high latitudes, the E and F regions of the ionosphere are strongly coupled through nearly vertical magnetic field lines. To simultaneously and directly relate the E and F regions' plasma structures, we ran a coordinated conjunction campaign between Swarm satellites and Incoherent Scatter Radar in Tromsø, Norway, during a moderate ...
Yaqi Jin   +12 more
wiley   +1 more source

Electrical Conductivity of Hydrous Ultramafic Melts With Implications for Origin of Low Velocity Layer Atop of the 410 km Seismic Discontinuity

open access: yesGeophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Low‐velocity layers (LVLs) above the 410‐km discontinuity are commonly attributed to partial melt generated by dehydration melting when hydrous mantle transition‐zone material rises into the upper mantle, where water solubility in nominally anhydrous minerals decreases.
Takashi Yoshino, Longjian Xie
wiley   +1 more source

Enhancement of Dayside Westward Electrojet: Triggering Conditions and Current Closures

open access: yesGeophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Geomagnetic substorms are a major path for energy storage and release in the magnetosphere, which typically occur in the midnight sector with a strong enhancement of westward electrojets. However, by analyzing 37,940 events from a substorm list, about 3% of events unexpectedly initiated in the noon sector.
Haobo Fu   +5 more
wiley   +1 more source

Residual Magnetization Accumulation Enables Rapid Pre‐Polarized Surface NMR Groundwater Detection

open access: yesGeophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Surface nuclear magnetic resonance (SNMR) directly detects subsurface water, but its field application is constrained by the trade‐off between signal enhancement and survey throughput. Conventional pre‐polarization strengthens SNMR signals but requires long polarization pulses that markedly prolong acquisition. Here we show that repeated short
Xing Gao   +3 more
wiley   +1 more source

Ultra‐Low‐L Sub‐MeV Electron Microbursts During the May 2024 Super Storm

open access: yesGeophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract During the May 2024 super storm, we identified sub‐second microburst‐type relativistic electron precipitation events at McIlwain's L∼2 $L\sim 2$ in low‐Earth orbit using the Gamma‐ray Burst Monitor (CGBM) onboard the CALorimetric Electron Telescope on the International Space Station.
Miki Kurihara   +16 more
wiley   +1 more source

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