Solar Surface Wave (May 2, 2008)
SOHO's EIT telescope observed a wave streak across part of the solar surface when a (moderate) flare erupted on April 26, 2008. As seen in the extreme UV wavelength of 195 Angstroms, in both the pair of stills and the video clip, a series of "post-flare" loops above replace the pre-existing active region structure when a faint wave erupts toward the upper left and a noticeable dimming occurs with its passage: coronal plasma, at temperatures of 1.5 million Kelvin, has been swept out of that part of the corona by the wave and coronal mass ejection.
SOHO began its Weekly Pick some time after sending a weekly image or video clip to the American Museum of Natural History (Rose Center) in New York City. There, the SOHO Weekly Pick is displayed with some annotations on a large plasma display.
If your institution would also like to receive the same Weekly Pick from us for display (usually in Photoshop or QuickTime format), please send your inquiry to email@example.com.