Results 51 to 60 of about 20,265 (219)

Novel Modelling Approach for Obtaining the Parameters of Low Ionosphere under Extreme Radiation in X-Spectral Range

Applied Sciences, 2021
Strong radiation from solar X-ray flares can produce increased ionization in the terrestrial D-region and change its structure. Moreover, extreme solar radiation in X-spectral range can create sudden ionospheric disturbances and can consequently affect ...
Vladimir A. Srećković, Desanka M. Šulić, Veljko Vujčić, Zoran R. Mijić, Ljubinko M. Ignjatović   +4 more
doaj   +1 more source

Radio burst characteristics of solar proton flares

The Astrophysical Journal, 1982
To isolate the properties of solar radio bursts indicative of energetic (E>20 MeV) proton acceleration, we compare several groups of solar bursts. Intense centimetric bursts and metric type II bursts associated with solar flares at magnetically well-connected longitudes, but not resulting in detected prompt proton events, are compared with the radio ...
openaire   +1 more source

New interactive solar flare modeling and advanced radio diagnostics tools [PDF]

Proceedings of the International Astronomical Union, 2010
AbstractThe coming years will see routine use of solar data of unprecedented spatial and spectral resolution, time cadence, and completeness in the wavelength domain. To capitalize on the soon to be available radio facilities such as the expanded OVSA, SSRT and FASR, and the challenges they present in the visualization and synthesis of the multi ...
Fleishman, Gregory D., Nita, Gelu M., Gary, Dale E.   +2 more
openaire   +2 more sources

Two dimensional time evolution of beam-plasma instability in the presence of binary collisions [PDF]

, 2016
Energetic electrons produced during solar flares are known to be responsible for generating solar type III radio bursts. The radio emission is a byproduct of Langmuir wave generation via beam-plasma interaction and nonlinear wave-wave and wave-particle ...
Kontar, Eduard, Tigik, S.F., Yoon, P.H., Ziebell, L.F.   +3 more
core   +2 more sources

Solar Soft X‐Ray Proxy Derived From Observed Auger Photoelectrons by MGS and a 1999–2006 Flare Catalog at Mars

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract This study uses a novel approach to infer the solar soft X‐ray (SXR) irradiance from Auger photoelectron fluxes. Solar SXR irradiance is highly variable, particularly during solar flares. Solar SXR photons at ∼< ${\sim} < $2.5 nm produce oxygen Auger photoelectrons by photoionizing atmospheric constituents. More specifically, we derive the fit
Shaosui Xu, Edward M. Thiemann, David L. Mitchell, Phillip C. Chamberlin   +3 more
wiley   +1 more source

A Joint Microwave and Hard X-Ray Study toward Understanding the Transport of Accelerated Electrons During an Eruptive Solar Flare

The Astrophysical Journal
The standard flare model, despite its success, is limited in comprehensively explaining the various processes involving nonthermal particles. One such missing ingredient is a detailed understanding of the various processes involved during the transport ...
Surajit Mondal, Andrea F. Battaglia, Bin Chen, Sijie Yu   +3 more
doaj   +1 more source

A Comparative Study of Ground-level Enhancement Events of Solar Energetic Particles

The Astrophysical Journal, 2023
Major solar eruptions can accelerate protons up to relativistic energies. Solar relativistic ions arriving at 1 au may cause a solar particle event detectable by the worldwide network of neutron monitors (NMs), a ground-level enhancement (GLE) event ...
Leon Kocharov, Alexander Mishev, Esa Riihonen, Rami Vainio, Ilya Usoskin   +4 more
doaj   +1 more source

Assessing Magnetic Fluctuations Effects in the South American Sector in Relation to Global Variations Using Ksa Index, Kp Index, and Hybrid Formats During Quiet Times Across the Seasons of the 2020 Solar Minimum

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract Geomagnetic indices can be used to quantify variations in geomagnetic activity caused by Sun‐Earth interactions across the magnetosphere and ionosphere. The global Kp index is widely used as a global geomagnetic indicator, but it is based mostly on the Northern Hemisphere with no contributions from South American observatories.
L. M. Guizelli, C. M. Denardini, J. Moro, L. C. A. Resende, S. S. Chen, P. K. Nyassor   +5 more
wiley   +1 more source

Segmentation and Tracking of Eruptive Solar Phenomena With Convolutional Neural Networks

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 1, February 2026.
Abstract Solar eruptive events are complex phenomena, which most often include coronal mass ejections (CME), CME‐driven compressive and shock waves, flares, and filament eruptions. CMEs are large eruptions of magnetized plasma from the Sun's outer atmosphere or corona, that propagate outward into the interplanetary space.
Oleg Stepanyuk, Kamen Kozarev
wiley   +1 more source

Predicting >10 MeV SEP Events from Solar Flare and Radio Burst Data

Universe, 2020
The prediction of solar energetic particle (SEP) events or solar radiation storms is one of the most important problems in the space weather field. These events may have adverse effects on technology infrastructures and humans in space; they may also ...
Marlon Núñez, Daniel Paul-Pena
doaj   +1 more source