Literally, in order for a vortex to be classified as a tornado, it must be in contact with the ground and the cloud base. Weather scientists haven't found it so simple in practice, however, to classify and define tornadoes (per this essay by Doswell).
Bikini Island, 2015. Credit: Emlyn Hughes. (Phys.org)âA team of researchers from Columbia University in New York has found that all of the Marshall Islands involved in nuclear tests by the U.S. are now habitable, except for Bikini Atoll.
Satellite view of Midway Islands. The Midway Islands or Midway Atoll [1] is a wildlife refuge in the north Pacific Ocean, roughly midway between California and East Asia, just east of the International Date Line.idway is part of the extended series of Pacific islands which include Hawaii. It is an atoll of several low, sandy islands. The two largest are Sand Island (the most developed) and Eastern Island (not to be confused with Easter Island), with the smaller Spit Island between them.