U.S 5 megatons Hydrogen bomb underground nuclear test 1971

The Cannikin underground nuclear test was a nuclear detonation conducted by the United States in 1971. It was conducted on Amchitka Island, Alaska, and was the largest underground nuclear test ever conducted by the United States.

The purpose of the Cannikin test was to explore the feasibility of using underground nuclear explosions as a means of peaceful resource development, specifically as a means of accessing natural gas reserves in deep geological formations. The test was conducted using a 5-megaton nuclear device and was designed to create a large underground cavity that could be used to store natural gas.

The test was controversial due to concerns about its potential environmental impact, particularly the risk of radioactive contamination of the surrounding area. The test also raised concerns about the impact of underground nuclear testing on the stability of the earth's crust and the potential for triggering earthquakes or other geological events.

Despite these concerns, the Cannikin test was ultimately conducted, and it created a large underground cavity that was later used to store natural gas. However, the test also led to increased scrutiny of underground nuclear testing, and it ultimately contributed to the decision to halt all underground nuclear testing by the United States in 1992.

Today, the legacy of the Cannikin test serves as a reminder of the potential dangers associated with nuclear testing, as well as the ongoing efforts to reduce the global nuclear threat and prevent the spread of nuclear weapons.#documentary
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[gregkientop]

As I recall, it was about a mile deep test. The preparation for this test took a couple of years... basically drilling armor-cased borehole large enough to admit a person on a cable. They lowered him down the mile into the hole with a cutting torch and excavation equipment. He cut through the thick steel casing and started to mine by hand until the excavation was large enough for pneumatic tools to be lowered down. Yes, these are very loud. It was like 110F and raining hot water down there. Lighting was on your helmet. Pretty much hell. The test caused thousands of earthquake tremors for months afterwards and raised the center of the island by about 25 ft. due to the fracturing of the rock increasing its volume. This view is clearly not ground zero. The imagery near ground zero was quite different/dramatic. The blast raised the island over ground zero fast enough to counter the effect of gravity... things just tended to float upwards for a few seconds, then fell back to earth. The major earthquake tremor caused the ground to sway back and forth beneath the pogo-stick-supported instrument trailers many feet. Portions of the shoreline collapsed into the sea. It shocked many of the biologists sent to observe the effects of the test on the local wildlife that they formed the Greenpeace organization as a result of this test. Crazy stuff all around.

[Count.Dracula]

Love the choice of music that went with this video. Thank you!!

[MidnightMiik]

Kind of lacks the awe inspiring devastation of a surface or atmospheric explosion. It must’ve been very deep. It was clearly shaking the camera but the surface seemed unmarred.

[dannybell]

How freaking deep was that thing buried? Nothing happened anywhere near what I expected

[MrTaterNubbz]

Who hired a camera man with parkinson's though

[thomasg]

beginning is normal speed, rest is 15x slowmo

[BobbyCoggins]

This looks like it is zoomed in waaay too close. Surely there is a wider shot of this test?

[PowllMorgan]

The other reason for this particular test was to proof the warhead for the Spartan anti-ballistic missile which was being deployed around that same time.

[MrRyomo]

Agreed, not a typical offensive, defensive ground/ sub-surfaced burst, . Maybe a mining test.

[Platos-Den]

Like my wife said " is that it?"

[idkidk]

My goodness the ground lifted What looks like many feet.. Wish i knew by how much.?

[emtee]

Literally lowered a whole missile (minus motor) down a shaft.

[billinct]

I thought this test was for the Spartan/Sprite anti-missile system warhead. The saying was you can't hit a bullet with a bullet... but you CAN hit it with a 5MT bomb detonated in it's path.

[florinivan]

One (possibly) unintended effect of moving to underground detonations was in limiting the yield of said tests. In order to prevent venting you need a very deep hole for any nuke with a yield in the megatons. Too difficult(not impossible) too time consuming. End result since the mid 60s most nuke tests except for France and China have been below 500 kt and since the 70s not even 200 kt. Underground testing made it almost impossible to test the multimegaton nukes the 10+ or more. No one has gone to that level since the early 60s.

[RwingDsquad]

Id like to see the cavity this thing created.

[dominicseanmccann]

Disappointing, especially for 5mt....

[marioragucci]

Project Faultless, in Nevada, demonstrated what happens with underground thermo nuclear detonations. By the 70's, folks realized tests like this was going a bit too far. Especially so close to USSR :(

[Captain-Cardboard]

That was the biggest disappointment since the birth of my son.

[tphilipson]

Good morning. That seemed like slow motion.!!??

[alexsander]

Because it didn't cause any damage to the ground ???Bad barely shook