grobi<p>Upper-atmospheric lightning</p><p>From Wikipedia, the free encyclopedia</p><p>Upper-atmospheric lightning and ionospheric lightning are terms sometimes used by researchers to refer to a family of short-lived electrical-breakdown phenomena that occur well above the altitudes of normal lightning and storm clouds. Upper-atmospheric lightning is believed to be electrically induced forms of luminous plasma. The preferred usage is transient luminous event (TLE), because the various types of electrical-discharge phenomena in the upper atmosphere lack several characteristics of the more familiar tropospheric lightning.<br>[...]<br>There are several types of TLEs, the most common being sprites. Sprites are flashes of bright red light that occur above storm systems. C-sprites (short for "columniform sprites") is the name given to vertical columns of red light. C-sprites exhibiting tendrils are sometimes called "carrot sprites". Other types of TLEs include sprite halos, ghosts, blue jets, gigantic jets, pixies, gnomes, trolls, blue starters, sprelves and ELVESs. The acronym ELVES (“emission of light and very low frequency perturbations due to electromagnetic pulse sources”) refers to a singular event which is commonly thought of as being plural. TLEs are secondary phenomena that occur in the upper atmosphere in association with underlying thunderstorm lightning.</p><p>TLEs generally last anywhere from less than a millisecond to more than 2 seconds. The first video recording of a TLE was captured unexpectedly on July 6, 1989, when researcher R.C. Franz left a camera running overnight to view the night sky. When reviewing the footage, two finger-like vertical images were seen on two film frames. The next known recordings of a TLE were taken on October 21, 1989, during orbits 44 and 45 of Space Shuttle mission STS-34, which was conducting the Mesoscale Lightning Observation Experiment.<br>[...]<br>More in reply ..</p><p><a href="https://defcon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>space</span></a> <a href="https://defcon.social/tags/earth" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>earth</span></a> <a href="https://defcon.social/tags/lightning" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>lightning</span></a> <a href="https://defcon.social/tags/astrophotography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>astrophotography</span></a> <a href="https://defcon.social/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>photography</span></a> <a href="https://defcon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>science</span></a> <a href="https://defcon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>physics</span></a> <a href="https://defcon.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nature</span></a> <a href="https://defcon.social/tags/NASA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>NASA</span></a></p>