Results 41 to 50 of about 1,290,320 (212)
Diagnostics of the Solar X-Flare Impact on Lower Ionosphere through the VLF-NAA Signal Recordings
Open Astronomy, 2011 An analysis of four solar flare X-ray irradiance effects on VLF signal amplitude and phase delay variations on the NAA/24.0 kHz signal trace during the period from 2005 September to 2006 December was carried out.
Kolarski Aleksandra +2 more
doaj +1 more source
Solar–Stellar Connection: X-Ray Flares to Energetic (E > 10 MeV) Particle Events
The Astrophysical Journal, 2023 Energetic particle environments are an important factor for the viability of life on exoplanets surrounding flare stars. In the heliosphere, large gradual solar energetic ( E > 10 MeV) particle (SEP) events are produced by shocks from fast coronal mass ...
S. W. Kahler, A. G. Ling
doaj +1 more source
Deep Flare Net (DeFN) Model for Solar Flare Prediction [PDF]
, 2018 We developed a solar flare prediction model using a deep neural network (DNN) named Deep Flare Net (DeFN). This model can calculate the probability of flares occurring in the following 24 hr in each active region, which is used to determine the most ...
N. Nishizuka +4 more
semanticscholar +1 more source
Scaling laws of solar and stellar flares
, 2007 In this study we compile for the first time comprehensive data sets of solar and stellar flare parameters, including flare peak temperatures T_p, flare peak volume emission measures EM_p, and flare durations t_f from both solar and stellar data, as well ...
Doyle J. G. +9 more
core +1 more source
Journal of Geophysical Research: Space Physics, 2019 The period of 6–11 September 2017 was an active period in which multiple solar flares and a major geomagnetic storm occurred. The two largest flares, an X9.3 and an X8.2, were a disk flare and a limb flare, respectively.
L. Qian +6 more
semanticscholar +1 more source
RADYNVERSION: Learning to Invert a Solar Flare Atmosphere with Invertible Neural Networks [PDF]
Astrophysical Journal, 2019 During a solar flare, it is believed that reconnection takes place in the corona followed by fast energy transport to the chromosphere. The resulting intense heating strongly disturbs the chromospheric structure and induces complex radiation hydrodynamic
C. Osborne, J. Armstrong, L. Fletcher
semanticscholar +1 more source
Statistical properties of solar Hα flare activity
Journal of Space Weather and Space Climate, 2017 Magnetic field structures on the solar atmosphere are not symmetric distribution in the northern and southern hemispheres, which is an important aspect of quasi-cyclical evolution of magnetic activity indicators that are related to solar dynamo theories.
Deng Linhua +3 more
doaj +1 more source
THE PROCESSES OF ENERGY RELEASE IN LOW-POWER SOLAR FLARES
Solar-Terrestrial Physics, 2019 Using flare patrol data for 1972–2010 [http://www.ngdc.noaa.gov/stp/space-weather/solar-data/solar-features/solar-flares/], we have conducted statistical studies of small solar flares.
Borovik A.V., Zhdanov A.A.
doaj +1 more source
Quasi-periodic Pulsations of Gamma-Ray Emissions from a Solar Flare on 2017 September 6 [PDF]
Astrophysical Journal, 2019 We investigate quasi-periodic pulsations (QPPs) of high-energy nonthermal emissions from an X9.3 flare (SOL2017-Sep-06T11:53), the most powerful flare since the beginning of solar cycle 24.
D. Li +4 more
semanticscholar +1 more source
E3S Web of Conferences, 2018 Intense X-ray fluxes during solar flares are known to cause enhanced ionization in the Earth’s ionospheric D, E and F region. This sudden change of ionospheric electron density profile is serious problem to radio wave communication and navigation system.
Fujimoto Akiko +2 more
doaj +1 more source