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solar flare |
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solar flareSudden 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. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | When a sunspot flares, a cloud of radiation (a form of high-energy waves or particles) erupts into space. |
Sunspot flare |
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