Only days prior to the collapse of the Champlain Towers South condo building in Surfside, Florida, the U.S. Navy conducted an experimental underwater nuclear explosion off the coast of Florida. No advance announcement of this test was made, but a video of the test was finally made public by the U.S. Navy after a 3.9 magnitude earthquake was registered by scientists in Miami. The U.S. Navy said that it conducted the experimental explosion as a "shock trial" for the Gerald Ford aircraft carrier.
The last time this type of "shock trial" took place, also ended in disaster. The 1946 Baker Event as part of Operations Crossroads, was conducted following World War II as a way for the U.S. Navy to prove that in a new era of nuclear warfare, the U.S. Navy was not obsolete and could withstand a nuclear attack. A nuclear bomb called Helen of Bikini was denotated 90 feet below the surface of the water in the middle of the Bikini Atoll at the Marshall Islands. The explosion caused a 6,000 ft high radioactive wave that crashed into the lagoon and destroyed a fleet of U.S. Navy warships.
A 1,800 foot wide X 30 foot deep crater remains on the ocean floor today along with eight sunken ships (some other ships were instantly vaporized and many more were so badly contaminated that they had to be destroyed.) One of the damaged ships was the former Nazi Heavy Cruiser Prinz Eugen that was surrendered by Germany to the British Royal Navy before being transferred to the U.S. Navy as a war prize. The U.S. Navy was so confident that the Prinz Eugen wouldn't sink that they left it filled with 230,000 gallons of crude oil at the time of the experimental blast. Unfortunately, the blast left the Prinz Eugen inoperable, and after towing the ship to the Kwajalein Atoll, it suddenly capsized in shallow water. In 2018, the U.S. Navy drilled into the capsized ship to take its crude oil.
Yes, the Champlain Towers were sinking for years and that may have played a role in the collapse, but we very much doubt that it was the only cause of the collapse. The Millennial Tower in San Francisco sunk 17 inches and was literally tilting 14 inches to the northwest and even it didn't collapse.