LTBT
underground
underground
underground
Prohibits nuclear weapon test explosions and any other nuclear explosions in three environments: in the atmosphere, in outer space and underwater, but does not prohibit underground nuclear explosions
LTBT
It was banned
That is called the Partial Test Ban Treaty. It was signed in 1963 and banned the testing of nuclear weapons in the atmosphere, outer space, and underwater.
The Limited Test Ban Treaty forbids nuclear testing in all areas except underground. Nuclear testing in the atmosphere, under water, and in outer space are all banned.
No, but Japan banned them within their own territory themselves.
August 5th, 1963 Three of the four nuclear powers sign a limited treaty that bans most, but not all, nuclear weapons testing. The 1963 treaty only banned "Atmospheric" tests (in the air, space, and underwater) not "most". Testing just moved underground and continued at about the same pace, maybe even faster for a while.
On August 5, 1963, representatives of the United States, Soviet Union and Great Britain signed the Limited Nuclear Test Ban Treaty, which prohibited the testing of nuclear weapons in outer space, underwater or in the atmosphere.
Nuclear testing above ground was eventually banned due to the environmental and health risks it posed, such as radioactive fallout and damage to ecosystems. The testing also raised concerns about escalating the arms race and increasing the threat of nuclear war. This led to international agreements, such as the Partial Nuclear Test Ban Treaty, to halt above-ground nuclear testing.