The nuclear test was named Cannikin. The following information was gathered from Wikapedia (
en.wikipedia.org/wiki/Amchitka). There is a You Tube video for this test
.
"Cannikin was detonated on November 6, 1971, as the thirteenth test of the Operation Grommet (1971–1972) underground nuclear test series. The announced yield was 5 megatons - the largest underground nuclear test in US history. (Estimates for the precise yield range from 4.4 to 5.2 megatons). The ground lifted 20 feet, caused by an explosive force almost 400 times the power of the Hiroshima bomb. Subsidence and faulting at the site created a new lake, over a mile wide. The explosion caused a seismic shock of 7.0 on the Richter scale, causing rock falls and turf slides of a total of 35,000 square feet. Though earthquakes and tsunamis predicted by environmentalists did not occur, a number of small tectonic events did occur in the following weeks, (some registering as high as 4.0 on the Richter scale) thought to be due to the interaction of the explosion with local tectonic stresses.
According to wildlife surveys following the Cannikin event by the University of Alaska Fairbanks, 700-2,000 sea otters were killed by over pressures in the Bering Sea as a direct result of the explosion. This survey showed that number of sea otters endangered by the blast was far greater than the Atomic Energy Commission had predicted."
COCHRANE was accompanied by USS CARPENTER DD-825 (she was often referred to as the surface submarine as she appeared to spend more time underwater than on top). During the underway periods the weather decks were secured to prevent a man overboard situation, seas were estimated to be in excess of 50 feet with winds greater than 100 knots but this could not be documented since the anemometers were both rendered useless. There were reports of "green water" crashing on the top of the ASROC launcher and going over director one. One fond memory I have is the short lines on the mess deck and learning how to eat with one hand while attempting to keep my tray level with the other. Those were the days!!!