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New satellite observations of terrestrial gamma-ray flashes reveal surprising features of mysterious blasts from Earth

Multimedia:

Artist's conception of lightning strikes above the clouds triggering gamma-ray bursts. The red spark is a red sprite, blue jets are the short sparks, and the purple flash is the terrestrial gamma-ray flash (TGF).
Credit: NASA (10 MB)

On this map of the world, red areas are regions that receive a lot of lightning, as recorded by satellites, while the flashes are individual TGFs observed by RHESSI. Note that the TGFs occur more frequently in regions with higher lightning probability.
Credit: NASA/NASDA. (1.9 MB)

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UCSC geophysicist creates computer simulation of Indian Ocean tsunami

Watch Video (QuickTime format). Credit: Steven Ward
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UCSC biologist Terrie Williams tells a story of adventure and discovery in Antarctica in her new book, The Hunter's Breath

Watch Video (6.2MB, QuickTime format). Credit: Bill Hagey, Pisces Design (San Diego)
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View/download high-resolution images of seals and researchers in Antarctica

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