"The Fog: A Never Before Published Theory of the Bermuda Triangle Phenomenon," by Rob MacGregor and Bruce Gernon include reports of an "electronic fog" that both men experienced while flying in the Bermuda Triangle. On December 4, 1970, Gernon and his father were flying to Bimini in clear skies when they saw a strange cloud with almost perfectly round edges hovering over the Miami shore. As they flew over it, the cloud began spreading out, matching or exceeding their speed. At 11,500 feet, they thought that they had escaped the "cloud," only to discover that it had formed a tunnel. It appeared the only way they could escape the cloud was to go through the tunnel. Once inside, they saw lines on the walls that spun in a counterclockwise direction. Gernon's navigational instruments went haywire and the compass spun counterclockwise.
Gernon reported that he "realized that something very bizarre had happened. Instead of the clear blue sky that we expected at the end of the tunnel, everything appeared a dull, grayish white. Visibility appeared to be about two miles, but there was absolutely nothing to see - no ocean, no horizon, no sky, only a gray haze."
When Gernon contacted Miami Air Traffic Control to get radar identification, the controller said that there were no planes on radar between Miami, Bimini and Andros. After several minutes, Gernon heard the air traffic controller report that a plane had been spotted directly over Miami. Gernon didn't think he could possibly be over Miami Beach, because it usually took 75 minutes to get to Miami and only 47 minutes had passed. At this same time, the cloud tunnel began to peel away in what he described as ribbons of fog. The instruments began operating normally and Miami Beach was directly below them. This loss of time, confirmed by their watches and the plane's clock, made Gernon believe that the electronic fog had time travel qualities.
Gernon experienced the fog one more time in flight with his wife. Many other pilots have had similar experiences in the area. Gernon believes that powerful electromagnetic storms from within the Earth break through the surface and come into the atmosphere where they soon disappear, leaving electronic fog. According to Gernon, a Swedish scientist has found that magnetism is weaker in the triangle than anywhere else on Earth, which may be why the fog happens more there than anywhere else.
For more on this theory, listen to this Paranormal Podcast interview with Bruce Gernon. When Don Pelz of Indiana heard of Gernon's experience, he contacted him about his own. He had also seen the doughnut shaped clouds 10 years ago and was able to retrieve radar images of what Gernon calls a "time storm." You can view them at Pelz's Web site.