MUSHROOM CLOUD FROM SEA OFF JAPAN
Five Boeing 747ís flew through or near the cloud on their way to Anchorage, Alaska. The aircraft were checked at Anchorage for radioactive contamination, but nothing was found. This showed that the huge "explosion" had been non-nuclear.
The ocean in the area is also about 21,000 feet deep. That is really too deep for a submarine volcano to have erupted and caused the cloud. (Besides, a volcano would have continued to snort at least a bit, and so that appears to be out of the question as a possible cause of the incident.)
In short, a manmade phenomenon is indicated.
we know it was a cold explosion. As Iíve stated previously, a colleague has in
fact produced the basic effect over a dish of water in the laboratory, using a
small scalar interferometer in the endothermic mode.