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Last updated on April 20, 2014 at 8:28 EDT
Magnetic Structures
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Magnetic Structures

May 17, 2012
This composite image shows the HMI magnetic field in blue and orange (indicating opposite polarity) aligned with the AIA 171 channel in extreme ultraviolet superimposed over it (May 23, 2010). The juxtaposition is especially effective at showing how the arcs that we observe in UV light emerge from regions of strong magnetic field.