Solar Flare in Extreme UV (IMAGE)
Caption
Observation of a large solar flare on Sept. 10, 2017 in extreme ultraviolet (grayscale background, by NASA's Solar Dynamics Observatory) and microwave (red to blue indicate increasing frequencies, observed by the Expanded Owens Valley Solar Array). Light orange curves are selected magnetic field lines from the matching theoretical solar eruptive flare model. The flare is driven by the eruption of a twisted magnetic flux rope (illustrated by a bundle of color curves). Microwave sources are observed throughout the central region where a large-scale reconnection current sheet --the flare's "central engine" -- is located and are used to measure its physical properties.
Credit
CSTR/NJIT, B. Chen, S. Yu; NASA Solar Dynamics Observatory
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