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Improvement of Sun Flare Prediction by SVM Integrated GA
2015 11th International Conference on Signal-Image Technology & Internet-Based Systems (SITIS), 2015Solar activity has various influences on the global environment, in particular on the weather and the likelihood of natural disasters. In particular, it may have serious impacts on Earth such as failure of satellite communication and navigation (GPS), satellite damage, increased radiation exposure to astronauts, geomagnetic storm and aurora, and power ...
Yukiko Yamamoto +6 more
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Production of flare accelerated particles at the sun
2008Energetic particles take a fundamental part in the physics of solar flares because they carry a large fraction of the energy released. The most direct and quantitative information on the physical processes involved in the production of non-thermal electrons and ions has been taken from the wealth of hard X-ray (HXR) and gamma-ray (GR) observations ...
Gérard Trottet, Nicole Vilmer
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Flare-Driven Acoustic Modes in the Sun
2009We have analyzed disk-integrated velocity signals at the solar surface obtained from full-disk Doppler images as observed with MDI (Michelson and Doppler Imager) on board SoHO (Solar and Heliospheric Observatory) to study the effect of solar flares on acoustic velocity oscillations.
B. Kumar, P. Venkatakrishnan
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Spectral observations of flare stars in the neighborhood of the sun
Astrophysics, 2013Results of spectral monitoring of the flare stars HU Del, CM Dra, WX UMa, and VW Com by the 2.6-m telescope at the Byurakan Observatory during May-June 2012 with the SCORPIO spectral camera are reported. A strong flare of WX UMa was recorded during the observation period, as well as faint flares of CM Dra and HU Del, while no variations in brightness ...
N. D. Melikian +3 more
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Flaring in multipolar regions on the sun: The 1999 July 19 flare
2002Abstract This presentation focuses on a possibility of creation of a twisted magnetic flux system in the multipolar active region NOAA 8636 on 1999 July 19 as a subsequence of interaction of low-lying coronal loops. It is speculated that the flare that occurred in the active region destabilized the overlying magnetic arcade and triggered a coronal ...
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Ultimate moon shot reveals the sun's flare
New Scientist, 2013Shot by a shadow tracker, this image of our star will help explain why the sun's upper atmosphere is so ...
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Flares and coronal heating in the sun and stars
2008Many forms of energy input into coronae have been proposed as the dominant heating mechanism. Here I review topical aspects of impulsive releases of magnetic energy. Several solar phenomena from bright points to coronal mass ejections are attributed to free magnetic energy apparently available in the corona. The possibility that magnetic energy release
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The transport of flare plasma from the Sun to the Earth
Planetary and Space Science, 1968Abstract The shape of the shock front produced in the solar wind by the plasma from highly geo-effective solar events is determined. This shape is based on an analysis of data on the size of the sudden commencements of geomagnetic storms. The analysis is made using gas dynamics.
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A comparison of high-energy events in the quiet Sun with solar flares
Solar Physics, 1983Observations of high-speed coronal clouds (OSO-7), flare ejecta (Skylab) and high-energy jets (HRTS) are compared. It is possible that the same physical mechanism — an expanding loop — which is responsible for the high speed jets (400 km sec−1, 2.5 x 1026 ergs) can also account for the high-speed coronal clouds (1300 km sec−1, 4 x 1030 ergs), which ...
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