In six sunspots mapped across five AIA temperature channels, five-minute oscillation power forms an expanding ring around the umbra that becomes disordered in the high corona, while three-minute power concentrates in the umbra and at coronal loop footpoints.
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Spatial Distributions of Sunspot Oscillation Modes at Different Temperatures
In six sunspots mapped across five AIA temperature channels, five-minute oscillation power forms an expanding ring around the umbra that becomes disordered in the high corona, while three-minute power concentrates in the umbra and at coronal loop footpoints.