19 September 2014 - Mission Day: 6867 - DOY: 262
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MDI Single Dopplergram Minus 45 Image Average Subtracting an average solar velocity image observed over 45 minutes from a single velocity image reveals the surface motions associated with sound waves traveling through the Sun's interior. The smallscale light and dark regions represent the up and down motions of the hot gas near the Sun's surface. The pattern falls off towards the limb because the acoustic waves are primarily radial.

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