solar flare


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flare, solar:

see chromospherechromosphere
[Gr.,=color sphere], layer of rarefied, transparent gases in the solar atmosphere; it measures 6,000 mi (9,700 km) in thickness and lies between the photosphere (the sun's visible surface) and the corona (its outer atmosphere).
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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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
In the second study, scientists investigated a connection between solar flares and activity in Earth's atmosphere.
Solar flares are categorized by the amount of their energy.
So even a large solar flare doesn't always mean large aurorae.
Among all of the above models of various orders the effort is being for selection of a model which is most adequate for the empirical study of solar flare activity.
The researchers found that a 3D model of a solar flare correlated closely with their observations, and radio observations also revealed an intermittent storm of noise that captured the slipping nature of the magnetic reconnections.
These coronal mass ejections (CMEs), many of which begin as solar flares from inside the sun, rip out a chunk of the sun's atmosphere as they escape its gravity.
He also sends plain messages every three hours to the Air Force Weather Agency to provide an up-to-date picture of the sun and draws sunspots daily to help forecasters predict the possibility of large solar flares like the May 12 Mother's Day event.
The increase in the hard X-ray emission over the background level caused by the solar flare was reliably detected by the SONG instrument beginning from 11:02:11 to 11:12:30 (see Figure 4).
The fuss began in the first week this month at an active region on the Sun known as 1429, with a big solar flare that was associated with a burst of solar wind and plasma known as a coronal mass ejection that thrust toward the Earth at some four million miles per hour (6.4 million kilometers per hour).
NASA warns these interconnected networks can be energized by a solar flare, causing "an avalanche of blackouts carried across continents [that] ...