Results 81 to 90 of about 1,149,927 (208)

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

Geophysical 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, Satoshi Nakahira, Ryuho Kataoka, Yoshizumi Miyoshi, Yuto Katoh, Kazutaka Yamaoka, Yuta Kawakubo, Ken Ebisawa, Shoji Torii, Kazuhiro Yamamoto, Atsuki Shinbori, Shoya Matsuda, Yoshiya Kasahara, Fuminori Tsuchiya, Iku Shinohara, Lauren W. Blum, Alessandro Bruno   +16 more
wiley   +1 more source

High-frequency Alfven waves in multi-ion coronal plasma : observational implications [PDF]

, 2005
We investigate the effects of high-frequency (of order ion gyrofrequency) Alfvén and ion-cyclotron waves on ion emission lines by studying the dispersion of these waves in a multi-ion coronal plasma.
Ofman, L. (Leon), Davila, J. M. (Joseph M.), Viñas, A.-F., Nakariakov, V. M. (Valery M.)   +3 more
core   +1 more source

Detection of Kink Oscillations in Solar Coronal Loops by a Convolutional Neural Network–Long Short-term Memory Neural Network

The Astrophysical Journal Supplement Series
A hybrid machine learning model, which combines a shallow convolutional neural network and a long short-term memory (CNN-LSTM) network, has been developed to automate the detection of kink oscillations in coronal plasma loops within large volumes of high-
Sergey A. Belov, Yu Zhong, Dmitrii Y. Kolotkov, Valery M. Nakariakov   +3 more
doaj   +1 more source

MMS Observations of the Energetic Particles Within Kelvin‐Helmholtz Waves at the Boundary of the 10 May 2024 Coronal Mass Ejection (CME)

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract On 10 May 2024, Earth was hit by a CME that drove the largest geomagnetic storm in 20 years. Multi‐spacecraft observations previously showed that the ∼100 nT north‐south IMF bz ${b}_{z}$ variation was driven by Kelvin‐Helmholtz waves with wavelength ∼250 RE ${R}_{E}$ and reconnection jets in the ±z $\pm z$‐direction (Nykyri, 2024a, https://doi.
Katariina Nykyri, Neetasha Arya, Scott Boardsen, Guan Le, Harri Laakso, Lynn Wilson, Xuanye Ma, Katherine Holland, Brandon Burkholder, Leon Ofman, Kyoung‐Joo Hwang, Dinesh Radhakrishnan, Shiva Kavosi, Daniel Gershman, Christine Gabrielse, Barbara Giles, Stephen Fuselier, Jim Burch   +17 more
wiley   +1 more source

The UK Met Office’s Coronal Mass Ejection (CME) Ensemble Prediction System

Space Weather, Volume 24, Issue 7, July 2026.
Abstract We describe the 24‐member Coronal Mass Ejection (CME) ensemble prediction system that is used operationally at the UK's Met Office Space Weather Operations Center (MOSWOC) to forecast the arrival time of CMEs at Earth. The ensemble system was built on ad‐hoc assumptions and there is the need to investigate whether the technique can be improved
Siegfried Gonzi, D. R. Jackson, F.‐X. Bocquet, V. J. Pizzo, E. Adamson, G. Millward, A. R. Marble, D. Odstrcil, C. N. Arge   +8 more
wiley   +1 more source

Magnetic Topology and Loop Statistics in Observed Coronal Holes Using Potential Field Modeling

The Astrophysical Journal
Potential field source surface (PFSS) models are widely used to study the solar corona and form the basis for solar wind forecasting, yet they often fail to reproduce observed properties of coronal holes.
Stephan G. Heinemann, Jens Pomoell, Manuela Temmer   +2 more
doaj   +1 more source

Soft Proton Environment Modeling for SMILE Using XGBoost and Solar Cycle–Informed Synthetic Data Sets

Space Weather, Volume 24, Issue 7, July 2026.
Abstract Soft proton contamination presents a persistent threat to the performance of space‐based X‐ray observatories such as ESA's upcoming Solar‐wind Magnetosphere Ionosphere Link Explorer (SMILE). This study develops a machine‐learning framework for modeling soft proton fluxes in the 92.2–159.7 keV range, tailored to SMILE's elliptical, highly ...
Simon Mischel, Elena A. Kronberg, C. P. Escoubet   +2 more
wiley   +1 more source

Modeling of Condensations in Coronal Loops Produced by Impulsive Heating with Variable Frequencies and Locations

The Astrophysical Journal
We present the results of models of impulsively heated coronal loops using the 1D hydrodynamic Adaptively Refined Godunov Solver code. The impulsive heating events (which we refer to as nanoflares ) are modeled by discrete pulses of energy along the loop.
Therese A. Kucera, James A. Klimchuk, Manuel Luna   +2 more
doaj   +1 more source

A New Model of Cutoff Latitude for Solar Energetic Protons Based on the Partial Least Squares Method

Space Weather, Volume 24, Issue 7, July 2026.
Abstract Solar energetic particle (SEP) events can cause space weather hazards, especially at high altitudes and in the polar regions. Therefore, it is important to determine the boundaries that SEPs with different energies/rigidities can access and impact. In this work, we develop a new model of cutoff latitude for solar energetic protons covering the
Zhenghao She, Hui Zhu, Qian Song, Yao Chen, Yingying Zhao, Huicong Chen, Zhijie Qin   +6 more
wiley   +1 more source

Signatures of Damping Nonlinear Oscillations by Kelvin–Helmholtz Instability–induced Turbulence in Synthetic Observations

The Astrophysical Journal
Large-amplitude decaying kink oscillations of coronal loops are strongly influenced by nonlinear processes such as Kelvin–Helmholtz instability (KHI) and turbulence, although comprehensive theoretical understanding and observational confirmation remain ...
Sihui Zhong, Andrew Hillier, Iñigo Arregui   +2 more
doaj   +1 more source