http://grblog.org/grblog.php
Gamma-ray Burst Real-time Sky Map
http://grb.sonoma.edu/
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全天X線監視装置MAXI: Monitor of All-sky X-ray Image
http://maxi.riken.jp/news/jp/
Terrestrial gamma ray flashes (TGFs) Terrestrial gamma ray flashes (TGFs) were discovered in 1994 emanating from the tops of thunderclouds.
Thundercloud gamma rays hint at origins of lightning - New Scientist
http://www.newscientist.com/article/mg20627654.700-thundercloud-gamma-rays-hint-at-origins-of-lightning.html
