Results 151 to 160 of about 2,470 (245)

A Model for Recommending Historical Similar Events in Forecasting CME Geoeffectiveness

Space Weather, Volume 24, Issue 7, July 2026.
Abstract Coronal mass ejections (CMEs) are among the key solar eruptive activities, triggering space weather disturbances. Thus, forecasting their geoeffectiveness has become a research focus. This study constructs a model to recommend similar events for forecasting the geoeffectiveness of CMEs.
Yurong Shi, Bingxian Luo, Jingjing Wang, Yanhong Chen, Siqing Liu   +4 more
wiley   +1 more source

Accurate determination of chemical abundances near a supermassive black hole. [PDF]

Nat Astron
XRISM Collaboration.
europepmc   +1 more source

Development and Cancellation of Long‐Duration Positive Ionospheric Storms: Both Changes of the F2‐Layer Peak Height and O/N2 Ratio Can Be Decisive

Space Weather, Volume 24, Issue 7, July 2026.
Abstract For decades, two competing hypotheses on the key drivers of mid‐latitude long‐duration positive ionospheric storms (LDPS) have been considered: (a) an increase of the F2‐layer peak height (hmF2) and (b) an increase in the atomic oxygen to molecular nitrogen density ratio (O/N2).
D. V. Kotov, M. O. Reznychenko, P. G. Richards, O. V. Bogomaz, L. P. Goncharenko, L. J. Paxton, M. Hernández‐Pajares, A. I. Reznychenko, D. P. Shkonda, V. V. Barabash, L. Ya. Emelyanov, I. F. Domnin, A. Ye. Miroshnikov, V. P. Burmaka, D. A. Dzyubanov, Yu. I. Podyachiy   +15 more
wiley   +1 more source

Guided Waves Along a Density Interface in Partially Ionised Solar Plasmas. [PDF]

Sol Phys
Alshammari S, Ballai I, Verth G, Fedun V, Kozak L.   +4 more
europepmc   +1 more source

Validation of the IRI‐2020 Model Topside Ionosphere Options Through COSMIC‐1 and COSMIC‐2 Radio Occultation Profiles Collocated With Ionosonde Observations

Space Weather, Volume 24, Issue 7, July 2026.
Abstract This study validates the four topside ionosphere model options included in the latest release of the International Reference Ionosphere (IRI‐2020) model: IRI‐2001, IRI‐2001cor, IRI‐NeQuick, and the default IRI‐COR2. To assess their ability to reproduce the topside profile while minimizing uncertainties associated with F2‐layer peak modeling ...
A. Pignalberi, H. Haralambous, D. Bilitza, P. Coïsson, B. Nava, M. Pezzopane, F. Prol, A. Smirnov, D. R. Themens, C. Xiong   +9 more
wiley   +1 more source

Investigation of positron scattering from atomic fluorine and fluorine-containing molecules. [PDF]

RSC Adv
Yadav A, Antony B.
europepmc   +1 more source

A Novel Deep Learning Model for High‐Latitude Ionospheric Convection Using SuperDARN Data

Space Weather, Volume 24, Issue 7, July 2026.
Abstract Plasma convection at high latitudes is a key manifestation of magnetosphere–ionosphere coupling and serves as a critical indicator of space weather conditions. The Super Dual Auroral Radar Network (SuperDARN) provides essential data on ionospheric convection.
Bingjie Gao, Erxiao Liu, Zejun Hu, Jianjun Liu, Ding Yang, Lei Qiao, Xuan Chen   +6 more
wiley   +1 more source

A fast, accurate and oscillation-free spectral collocation solver for high-dimensional transport problems. [PDF]

Sci Rep
Cavallini N, Manzini G, Funaro D, Favalli A.   +3 more
europepmc   +1 more source

IRI Model Specification of the Upper Transition Height at the Equatorial Region: Comparison Against a Dedicated Model Based on C/NOFS Data During Low Solar Activity

Space Weather, Volume 24, Issue 7, July 2026.
Abstract The Upper Transition Height (UTH) is a critical parameter for understanding topside ionosphere dynamics. This study evaluates the UTH performance of the International Reference Ionosphere (IRI) model using the TBT15 ion composition option and compares it against a dedicated UTH model developed from the Communication/Navigation Outage Forecast ...
Fabricio Prol, Alessio Pignalberi, Artem Smirnov   +2 more
wiley   +1 more source

High-Efficiency Radiation via Fast Electron Beam Pinching in Nonuniform Plasmas. [PDF]

Research (Wash D C)
Zhu XL, Chen M, Sheng ZM.
europepmc   +1 more source