NASA observes the Sun and our space environment constantly with a fleet of spacecraft that study everything from the Sun’s activity to the solar atmosphere, and to the particles and magnetic fields in the space surrounding Earth. NASA works as the research arm of the nation’s space weather effort. government’s official source for space weather forecasts, watches, warnings, and alerts. To see how such space weather may affect Earth, please visit NOAA’s Space Weather Prediction Center, the U.S. The lack of knowledge of the detailed coronal magnetic eld usually leads to the creation of a simple homogeneous source model toanalysetheemission. Flares that are classified X10 or stronger are considered unusually intense. Flare parameters inferred from a 3D loop model 1513 Solar Spectroscopic Imager (RHESSI) combining both images with a spatial resolution of 2.3 arcsec and spectra. An X2 is twice as intense as an X1, an X3 is three times as intense, etc. X-class denotes the most intense flares, while the number provides more information about its strength. This flare is classified as an X1-class flare. 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. Solar flares are powerful bursts of radiation. The image shows a subset of extreme ultraviolet light that highlights the extremely hot material in flares and which is colorized here in teal. NASA’s Solar Dynamics Observatory captured this image of a solar flare - as seen in the bright flash at the Sun’s lower center - on Oct. NASA’s Solar Dynamics Observatory, which watches the Sun constantly, captured an image of the event. The Sun emitted a significant solar flare peaking at 11:35 a.m.
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