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solar flare
(redirected from Solar flares)

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solar flare

Sudden intense brightening of a small part of the Sun's surface, often near a sunspot group. Flares develop in a few minutes and may last several hours, releasing intense X rays and streams of energetic particles. They appear to be connected with changes in the Sun's magnetic fields during the solar cycle. The ejected particles take a day or two to reach the vicinity of Earth, where they can disrupt radio communications and cause auroras, and may pose a radiation hazard to astronauts.

solar flare [′sō·lər ′fler]
(astrophysics)
An abrupt increase in the intensity of the H-α and other emission near a sunspot region; the brightness may be many times that of the associated plage.
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Solar flares act like a flash bulb, giving added illumination and allowing C1XS to 'see' more elements.
Findings from India's Chandrayaan to provide new understanding of ... by Asian News International
[ILLUSTRATION OMITTED] The sun has entered its weakest cycle of magnetic activity since 1928, meaning fewer solar flares and coronal mass ejections, scientists predicted in a May 8 teleconference.
Calm expected from the sun by Barazesh, Solmaz / Science News
One thing they've learned more about during this low sunspot period is that for astronauts, exposure to galactic cosmic radiation is much worse than exposure to solar flares or other radiation in an active solar period.
A QUIET SUN; LOW SUNSPOT CYCLE FASCINATES SCIENTISTS WHO SAY THERE'S ... by The Santa Fe New Mexican (Santa Fe, NM)
 
 
 
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