Jun 20 2013 How did a third radiation belt appear in the Earth’s upper atmosphere? How did a third radiation belt appear in the Earth’s upper atmosphere?. Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Email a link to a friend (Opens in new window) Email Share on LinkedIn (Opens in new window) LinkedIn Share on Tumblr (Opens in new window) Tumblr Share on Pinterest (Opens in new window) Pinterest Like Loading... Related