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An Aurora Before the Storm
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An Aurora Before the Storm
Credit & Copyright: Jan Curtis (U. Alaska), ACRC
Explanation: Early April brought some of the most intense auroral storms this decade. An aurora on April 6 was reported to be the largest visible on Earth since 1989, and was seen throughout Europe and much of northern North America. On that day, many skywatchers expecting to see a rare alignment of planets were treated to a additional treat. Many reported aurorae with a relatively unusual red color. The above aurora recorded at dusk over Alaska sported the more typical green glow. A huge auroral ring can be seen superposed above trees and a building. Auroral activity occurs high in the Earth's atmosphere and is a direct result of storms on our Sun. As huge sheets of charged particles stream out from the Sun, a small fraction of these particles are funneled in by Earth's magnetic field and strike atoms high in the atmosphere, causing the sky to glow. The particles are harmless to people on Earth's surface, but can cause havoc on satellites in orbit far above.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Русский текст
Based on Astronomy Picture Of the Day
Публикации с ключевыми словами: aurora - storm - Earth's atmosphere - полярное сияние - Солнечная активность - Магнитное поле Земли
Публикации со словами: aurora - storm - Earth's atmosphere - полярное сияние - Солнечная активность - Магнитное поле Земли
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