Results 11 to 20 of about 1,152,990 (233)

Fast plasmoid-mediated reconnection in a solar flare. [PDF]

Nat Commun, 2022
Magnetic reconnection is a multi-faceted process of energy conversion in astrophysical, space and laboratory plasmas that operates at microscopic scales but has macroscopic drivers and consequences.
Yan X, Xue Z, Jiang C, Priest ER, Kliem B, Yang L, Wang J, Kong D, Song Y, Feng X, Liu Z.   +10 more
europepmc   +2 more sources

Solar Flare Intensity Prediction With Machine Learning Models [PDF]

Space Weather, 2020
We develop a mixed long short‐term memory (LSTM) regression model to predict the maximum solar flare intensity within a 24‐hr time window 0–24, 6–30, 12–36, and 24–48 hr ahead of time using 6, 12, 24, and 48 hr of data (predictors) for each Helioseismic ...
Zhenbang Jiao, Hu Sun, Xiantong Wang, Ward Manchester, Tamas Gombosi, Alfred Hero, Yang Chen   +6 more
doaj   +2 more sources

Verification of operational solar flare forecast: Case of Regional Warning Center Japan [PDF]

Journal of Space Weather and Space Climate, 2017
In this article, we discuss a verification study of an operational solar flare forecast in the Regional Warning Center (RWC) Japan. The RWC Japan has been issuing four-categorical deterministic solar flare forecasts for a long time.
Kubo Yûki, Den Mitsue, Ishii Mamoru
doaj   +2 more sources

Solar Flare Effects on the Earth’s Lower Ionosphere [PDF]

Solar Physics, 2021
Solar flares significantly impact the conditions of the Earth’s ionosphere. In particular, the sudden increase in X-ray flux during a flare penetrates down to the lowest-lying D-region and dominates ionization at these altitudes (≈60\documentclass[12pt ...
L. Hayes, Oscar S D O’Hara, S. Murray, P. Gallagher   +3 more
semanticscholar   +1 more source

Operational solar flare prediction model using Deep Flare Net [PDF]

Earth, Planets and Space, 2021
We developed an operational solar flare prediction model using deep neural networks, named Deep Flare Net (DeFN). DeFN can issue probabilistic forecasts of solar flares in two categories, such as ≥ M-class and
N. Nishizuka, Y. Kubo, Komei Sugiura, M. Den, M. Ishii   +4 more
semanticscholar   +1 more source

First Fermi-LAT Solar Flare Catalog [PDF]

, 2021
We present the first Fermi-Large Area Telescope (LAT) solar flare catalog covering the 24th solar cycle. This catalog contains 45 Fermi-LAT solar flares (FLSFs) with emission in the γ-ray energy band (30 MeV–10 GeV) detected with a significance of ≥5σ ...
M. Ajello, L. Baldini, D. Bastieri, R. Bellazzini, A. Berretta, E. Bissaldi, R. Blandford, R. Bonino, P. Bruel, S. Buson, R. Cameron, R. Caputo, E. Cavazzuti, C. C. Cheung, G. Chiaro, D. Costantin, S. Cutini, F. D’Ammando, F. de Palma, R. Desiante, N. Di Lalla, L. Di Venere, F. Dirirsa, S. Fegan, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, D. Gasparrini, F. Giordano, M. Giroletti, D. Green, S. Guiriec, E. Hays, J. Hewitt, D. Horan, G. Jóhannesson, M. Kovačević, M. Kuss, S. Larsson, L. Latronico, J. Li, F. Longo, M. Lovellette, P. Lubrano, S. Maldera, A. Manfreda, G. Martí-Devesa, M. Mazziotta, I. Mereu, P. Michelson, T. Mizuno, M. Monzani, A. Morselli, I. Moskalenko, M. Negro, N. Omodei, M. Orienti, E. Orlando, D. Paneque, Z. Pei, M. Persic, M. Pesce-Rollins, V. Petrosian, F. Piron, T. Porter, G. Principe, J. Racusin, S. Rainò, R. Rando, B. Rani, M. Razzano, S. Razzaque, A. Reimer, O. Reimer, D. Serini, C. Sgro’, E. Siskind, G. Spandre, P. Spinelli, D. Tak, E. Troja, J. Valverde, K. Wood, G. Zaharijas   +84 more
semanticscholar   +1 more source

Fine-grained Solar Flare Forecasting Based on the Hybrid Convolutional Neural Networks [PDF]

Astrophysical Journal, 2021
Improving the performance of solar flare forecasting is a hot topic in the solar physics research field. Deep learning has been considered a promising approach to perform solar flare forecasting in recent years.
Z. Deng, Feng Wang, H. Deng, Lei Tan, L. Deng, Song Feng   +5 more
semanticscholar   +1 more source

Measurement of magnetic field and relativistic electrons along a solar flare current sheet [PDF]

Nature Astronomy, 2020
In the standard model of solar flares, a large-scale reconnection current sheet is postulated to be the central engine for powering the flare energy release1–3 and accelerating particles4–6.
Bin Chen, Chengcai Shen, D. Gary, K. Reeves, G. Fleishman, Sijie Yu, F. Guo, S. Krucker, Jun Lin, G. Nita, X. Kong   +10 more
semanticscholar   +1 more source

The development of lower-atmosphere turbulence early in a solar flare. [PDF]

Sci Adv, 2018
IRIS observation of the initiation of a solar flare suggests that turbulence helps to heat the Sun’s lower atmosphere. We present the first observational study of the onset and evolution of solar flare turbulence in the lower solar atmosphere on an ...
Jeffrey NLS, Fletcher L, Labrosse N, Simões PJA.   +3 more
europepmc   +3 more sources

Spectral Signatures of Chromospheric Condensation in a Major Solar Flare [PDF]

Astrophysical Journal, 2020
We study the evolution of chromospheric line and continuum emission during the impulsive phase of the X-class SOL2014-09-10T17:45 solar flare. We extend previous analyses of this flare to multiple chromospheric lines of Fe i, Fe ii, Mg ii, C i, and Si ii
D. Graham, G. Cauzzi, L. Zangrilli, A. Kowalski, P. Simões, J. Allred   +5 more
semanticscholar   +1 more source