Results 31 to 40 of about 1,152,990 (233)
Identifying Solar Flare Precursors Using Time Series of SDO/HMI Images and SHARP Parameters [PDF]
Space Weather, 2019 In this paper we present several methods to identify precursors that show great promise for early predictions of solar flare events. A data preprocessing pipeline is built to extract useful data from multiple sources, Geostationary Operational ...
Yang Chen +9 more
semanticscholar +1 more source
Solar Flare Modified Complex Network
Astrophysical Journal, 2020 A constructive approach is developed to build the solar flare complex network by utilizing a visibility graph condition alongside the Abe–Suzuki method. Solar flare information such as position, start time, and peak flux is used for this purpose.
Amin Najafi +3 more
semanticscholar +1 more source
Feature Ranking of Active Region Source Properties in Solar Flare Forecasting and the Uncompromised Stochasticity of Flare Occurrence [PDF]
Astrophysical Journal, 2019 Solar flares originate from magnetically active regions (ARs) but not all solar ARs give rise to a flare. Therefore, the challenge of solar flare prediction benefits from an intelligent computational analysis of physics-based properties extracted from AR
C. Campi +5 more
semanticscholar +1 more source
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
Persistent Quasi-periodic Pulsations during a Large X-class Solar Flare [PDF]
Astrophysical Journal, 2019 Solar flares often display pulsating and oscillatory signatures in the emission, known as quasi-periodic pulsations (QPP). QPP are typically identified during the impulsive phase of flares, yet in some cases, their presence is detected late into the ...
L. Hayes +5 more
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
Deep Learning–based Solar Flare Forecasting Model. III. Extracting Precursors from EUV Images
The Astrophysical Journal Supplement Series, 2023 A solar flare is one of the most intense solar activities, and flare forecasting is necessary to avoid its destructive impact on the near-Earth space environment and technological infrastructure.
Dezhi Sun +3 more
doaj +1 more source
Fermi-LAT Observations of the 2017 September 10 Solar Flare [PDF]
Astrophysical Journal, 2018 The Fermi-Large Area Telescope detection of the X8.2 GOES class solar flare of 2017 September 10 provides for the first time observations of a long-duration high-energy gamma-ray flare associated with a ground-level enhancement (GLE).
N. Omodei +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