Though performed

To conduct the Vela Uniform test on the island, Long Shot, the Department of Defense occupied Amchitka from 1964 to 1966, with the AEC providing the device, measuring instruments, and scientific support.[16] The goal was "to determine the behavior and characteristics of seismic signals generated by nuclear detonations and to differentiate them from seismic signals generated by naturally occurring earthquakes."[19]

Although it would not be publicly announced until March 18, 1965, senior Alaskan officials were notified the previous February.[20] After the devastating Great Alaska Earthquake of March 27, 1964, the governor expressed concern about the psychological effects of the test on the populace. He was quickly reassured.[20]

Long Shot was detonated on October 29, 1965, and the yield was 80 kilotons (330 TJ). It was the first underground test in a remote area, and the first test managed by the DoD.[5] While there was no surface collapse,[3] tritium and krypton were found at the surface following the test;[3][21] this was not made public until 1969.[21]
[edit] Milrow and Cannikin tests

Though performed as part of the Nuclear Weapons Testing Program,[19] "[the] purpose of the Milrow test was to test an island, not a weapon."[22] It was a "calibration shot", intended to produce data from which the impact of larger explosions could be predicted, and specifically, to determine whether the planned Cannikin detonation could be performed safely. Milrow was detonated on October 2, 1969, with an approximate yield of 1 to 1.2 megatons (4.2–5.0 PJ).[3][23]

The shockwave reached the surface with an acceleration of over 35 g (340 m/s2), causing a dome of the Earth's surface, approximately 3 km (2 mi) in radius, to rise about 5 meters (16 ft).[24] The blast "turned the surrounding sea to froth" and "forced geysers of mud and water from local streams and lakes 50 feet (15 m) into the air".[21] A "surface collapse feature", also known as a subsidence crater, was formed by material collapsing into the cavity formed by the explosion.[3]

Cannikin was intended to test the design of the Spartan anti-ballistic missile (ABM) interceptor – a high-yield warhead that "produced copious amounts of x-rays and minimized fission output and debris to prevent blackout of ABM radar systems."[25] The test would "measure the yield of the device, measure the x-ray flux and spectrum, and assure deployment of a reliable design.cheap hotels Sydney
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