I understand both sides studied the idea of tectonic and tsunami weapons. Why wouldn't be possible for 300kt to 50 MT, i noticed every time the Norks tested a small device ,under 10kt, was recorded on seismographs as mag 3-5 earthquake around the world. I read a rumor/article last month about Russian tsunami torpedo/bomb and there's an interesting ww3 prophecy about this to be used.
"Prophecies Of Alois Irlmaier
By James Donahue
Alois Irlmaier was a dowser and well digger who lived in Freislassing, Bavaria. He gained fame because of his psychic abilities. Some accused him of being a warlock. He was born in 1894 and died in 1959.
Irlmaier who used his clairvoyant skills to help people locate missing friends and family members. His fame, however, grew from his prophetic visions of a third world war, an attack on the Vatican that causes the Pope to flee, a revolution in Russia, a terrible event involving three days of darkness, a warming climate and the sinking of three large cities under the sea.
Irlmaier said the images of future events appeared to him like a movie. A lot of information came to him as numbers and he said he could not understand much of what he saw. He predicted his own death in July 1959. Before he died he said: “I am glad that I can go now because I won’t have to experience what I see.”
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"Then comes a single aircraft from the East. It throws a "neutralizer" in the great water by England. Then the water lifts in one single piece as high as a tower and falls back down. It makes an earthquake and a giant wave and everything will be over-flooded. Almost all of England and the European coast to Berlin will sink except for a few mountain peaks.........................."
more here and lots of videos on YouTube
http://www.perdurabo10.net/alois-irlmaier.html