Updated on MFS - Strange But True - places 11 .The Catatumbo Lightning (Spanish Relámpago del Catatumbo) is an atmospheric phenomenon in Venezuela. It occurs strictly in an area located over the mouth of the Catatumbo River where it empties into Lake Maracaibo. The frequent, powerful flashes of lightning over this relatively small area are considered by some to be the world's largest single generator of tropospheric ozone. It originates from a mass of storm clouds that form a voltaic arc at more than 5 km of height, during 140 to 160 nights a year, 10 hours per day and up to 280 times per hour. It occurs over and around Lake Maracaibo, typically over a bog area that forms where the Catatumbo River flows into the Venezuelan lake.Read more about it on MFS,with videoclip.