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A Hyder flare is slow, large-scale brighte … A Hyder flare is slow, large-scale brightening that occurs in the solar chromosphere. It resembles a large but feeble solar flare and is identifiable as the signature of the sudden disappearance of a solar prominence (a "disparition brusque"). These events occur in the quiet Sun, away from active regions or sunspot groups, and typically in the polar crown filament zone near the Sun's poles. Hyder flares have a two-ribbon morphology and can be faintly observed in chromospheric emission lines such as Hα or as enhanced absorption in He I 1083 nm line. Hyder flares are caused by the unstable eruption of a magnetic filament channel; the filament rises and may escape from the Sun as a part of a coronal mass ejection, and the visible flare marks the magnetic connectivity of the coronal disturbance. Unlike active region flares, Hyder flares take a much longer time to reach peak intensity, as much as 30 to 80 minutes and then can continue for several hours. They have not caused any interference with Earthly communications like solar flares, and are rather weak. The discovery of Hyder flares has been mainly associated with Charles Hyder who developed the mechanism describing them in 1967. Some disagree with Hyder's findings and his mechanism, on what actually produces the flare. Although rare, a notable occurrence that took place November 1, 2014, confirmed that they display special characteristics distinguishing them from solar flares.ics distinguishing them from solar flares.
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A Hyder flare is slow, large-scale brighte … A Hyder flare is slow, large-scale brightening that occurs in the solar chromosphere. It resembles a large but feeble solar flare and is identifiable as the signature of the sudden disappearance of a solar prominence (a "disparition brusque"). These events occur in the quiet Sun, away from active regions or sunspot groups, and typically in the polar crown filament zone near the Sun's poles. Hyder flares have a two-ribbon morphology and can be faintly observed in chromospheric emission lines such as Hα or as enhanced absorption in He I 1083 nm line. enhanced absorption in He I 1083 nm line.
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Hyder flare
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