arch16
EN_01160538_3551
The sun emitted a significant solar flare, peaking at 12:22 p.m. EDT on March 11, 2015. NASA's Solar Dynamics Observatory, which watches the sun constantly, captured an image of the event. Solar flares are powerful bursts of radiation. Harmful radiation from a flare cannot pass through Earth's atmosphere to physically affect humans on the ground, however -- when intense enough -- they can disturb the atmosphere in the layer where GPS and communications signals travel. This flare is classified as an X2.2-class flare. X-class denotes the most intense flares, while the number provides more information about its strength. An X2 is twice as intense as an X1, an X3 is three times as intense, etc. This image was captured by NASA's Solar Dynamics Observatory and shows a blend of light from the 171 and 131 ?ngstr?m wavelengths. The Earth is shown to scale. Credit: NASA/Goddard/SDO *** Please Use Credit from Credit Field ***
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1902-01-01
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