Underground nuclear testing is the test detonation of nuclear weapons that is performed underground. When the device being tested is buried at sufficient depth, the explosion may be contained, with no release of radioactive materials to the atmosphere.
The extreme heat and pressure of an underground nuclear explosion causes changes in the surrounding rock. The rock closest to the location of the test is vaporised, forming a cavity. Farther away, there are zones of crushed, cracked, and irreversibly strained rock. Following the explosion, the rock above the cavity may collapse, forming a rubble chimney. If this chimney reaches the surface, a bowl-shaped subsidence crater may form.
The first underground test took place in 1951; further tests provided information that eventually led to the signing of the Limited Test Ban Treaty in 1963, which banned all nuclear tests except for those performed underground. From then until the signing of the Comprehensive Test Ban Treaty in 1996, most nuclear tests were performed underground, in order to prevent nuclear fallout from entering into the atmosphere.
Nuclear weapons tests are experiments carried out to determine the effectiveness, yield, and explosive capability of nuclear weapons. Throughout the 20th century, most nations that developed nuclear weapons tested them. Testing nuclear weapons can yield information about how the weapons work, as well as how the weapons behave under various conditions and how personnel, structures, and equipment behave when subjected to nuclear explosions. Nuclear testing has often been used as an indicator of scientific and military strength, and many tests have been overtly political in their intention; most nuclear weapons states publicly declared their nuclear status by means of a nuclear test.
The first nuclear device was detonated as a test by the United States at the Trinity site on July 16, 1945, with a yield approximately equivalent to 20 kilotons of TNT. The first thermonuclear weapon technology test of engineer device, codenamed "Mike", was tested at the Enewetak atoll in the Marshall Islands on November 1, 1952 (local date), also by the United States. The largest nuclear weapon ever tested was the "Tsar Bomba" of the Soviet Union at Novaya Zemlya on October 30, 1961, with the largest yield ever seen (as of January 2016), an estimated 50–58 megatons.
From "Atomic Journeys." Want to see more oddities from the annals of America's Nuclear Testing history? See "Atomic Journeys - Welcome To Ground Zero" available on Amazon video direct in HD. Notice: No cow was killed in this demonstration.
published: 12 Apr 2019
Underground nuclear subsidence crater
Cool shot of an underground subsidence crater. The hole created by an underground nuclear explosion forms a hole deep below the surface collapses, resulting in a crater.
If you haven't seen the 70th anniversary version of "Trinity and Beyond yet, check it out at:
https://www.reelhouse.org/atomcentral/trinity-and-beyond-70th-anniversary
published: 25 Mar 2016
North Korea's underground nuclear test
According to intelligence reports, North Korea is preparing its third test of a nuclear device. The test would take place underground. In such tests, a nuclear device is placed into a drilled tunnel about 800 meters below the surface. The hole is then plugged with gravel and other materials to contain the explosion and fallout. The nuclear explosion vaporizes subterranean rock and sends seismic shockwaves through the ground. An underground chamber is created, which collapses and causes a crater on the surface.
Source: BBC
published: 29 May 2012
Underground Nuclear Test
Subsidence Crater Formation
Historic underground nuclear test causes the surface to subside which forms a crater - seven such craters are used as disposal cells at the Area 3 Radioactive Waste Management Site. Provided by the US Department of Energy under Public Domain rules.
published: 12 Apr 2007
Underground nuclear tests | AFP
North Korea said Tuesday it would restart a nuclear reactor to feed its atomic weapons programme, in its clearest rebuff yet to UN sanctions at the heart of soaring tensions on the Korean peninsula. Videographic explaining how underground nuclear tests are carried out.
published: 02 Apr 2013
HD largest underground nuclear test code name canninkin 5 MT
Biggest underground nuclear test code name canninkin 5 MT (equal to hydrogen bomb explosion !!)
conducted in Nov.6.1971.
unedited footage!
Countdown and detonation of an historic underground nuclear test at the Nevada National Security Site, formerly known as the Nevada Test Site. This film footage depicts the shock wave emanating from the surface ground zero and the resulting surface subsidence crater formed when the subsurface cavity created by the detonation collapses.
published: 14 Sep 2010
How Powerful is Korea's Military?
North Korea is one of the most secretive and isolated nations in the world—but when it comes to military power, it’s anything but quiet. With one of the largest standing armies on the planet, a growing nuclear arsenal, and advanced missile technology, North Korea is a force that commands global attention. But where does it rank in the global military power rankings in 2025? And what does that ranking actually mean for the world?
In this explosive video, we dive deep into:
💥 North Korea’s nuclear program – How many warheads does it have, and how far can its missiles reach?
🚀 Hypersonic missile technology – Why are these weapons a game-changer for global security?
💻 Cyber warfare capabilities – How does North Korea’s hacking prowess pose a threat to the world?
🛡️ Conventional forces – What ...
published: 02 Feb 2025
Underground nuclear tests
Japan and China said Monday they had not yet detected any atmospheric radiation from North Korea's nuclear test, amid fears of a leak from a "cave in" during the underground blast. Videographic explaining how underground nuclear tests are carried out.VIDEOGRAPIC
From "Atomic Journeys." Want to see more oddities from the annals of America's Nuclear Testing history? See "Atomic Journeys - Welcome To Ground Zero" availabl...
From "Atomic Journeys." Want to see more oddities from the annals of America's Nuclear Testing history? See "Atomic Journeys - Welcome To Ground Zero" available on Amazon video direct in HD. Notice: No cow was killed in this demonstration.
From "Atomic Journeys." Want to see more oddities from the annals of America's Nuclear Testing history? See "Atomic Journeys - Welcome To Ground Zero" available on Amazon video direct in HD. Notice: No cow was killed in this demonstration.
Cool shot of an underground subsidence crater. The hole created by an underground nuclear explosion forms a hole deep below the surface collapses, resulting in...
Cool shot of an underground subsidence crater. The hole created by an underground nuclear explosion forms a hole deep below the surface collapses, resulting in a crater.
If you haven't seen the 70th anniversary version of "Trinity and Beyond yet, check it out at:
https://www.reelhouse.org/atomcentral/trinity-and-beyond-70th-anniversary
Cool shot of an underground subsidence crater. The hole created by an underground nuclear explosion forms a hole deep below the surface collapses, resulting in a crater.
If you haven't seen the 70th anniversary version of "Trinity and Beyond yet, check it out at:
https://www.reelhouse.org/atomcentral/trinity-and-beyond-70th-anniversary
According to intelligence reports, North Korea is preparing its third test of a nuclear device. The test would take place underground. In such tests, a nuclear ...
According to intelligence reports, North Korea is preparing its third test of a nuclear device. The test would take place underground. In such tests, a nuclear device is placed into a drilled tunnel about 800 meters below the surface. The hole is then plugged with gravel and other materials to contain the explosion and fallout. The nuclear explosion vaporizes subterranean rock and sends seismic shockwaves through the ground. An underground chamber is created, which collapses and causes a crater on the surface.
Source: BBC
According to intelligence reports, North Korea is preparing its third test of a nuclear device. The test would take place underground. In such tests, a nuclear device is placed into a drilled tunnel about 800 meters below the surface. The hole is then plugged with gravel and other materials to contain the explosion and fallout. The nuclear explosion vaporizes subterranean rock and sends seismic shockwaves through the ground. An underground chamber is created, which collapses and causes a crater on the surface.
Source: BBC
Subsidence Crater Formation
Historic underground nuclear test causes the surface to subside which forms a crater - seven such craters are used as disposal cell...
Subsidence Crater Formation
Historic underground nuclear test causes the surface to subside which forms a crater - seven such craters are used as disposal cells at the Area 3 Radioactive Waste Management Site. Provided by the US Department of Energy under Public Domain rules.
Subsidence Crater Formation
Historic underground nuclear test causes the surface to subside which forms a crater - seven such craters are used as disposal cells at the Area 3 Radioactive Waste Management Site. Provided by the US Department of Energy under Public Domain rules.
North Korea said Tuesday it would restart a nuclear reactor to feed its atomic weapons programme, in its clearest rebuff yet to UN sanctions at the heart of soa...
North Korea said Tuesday it would restart a nuclear reactor to feed its atomic weapons programme, in its clearest rebuff yet to UN sanctions at the heart of soaring tensions on the Korean peninsula. Videographic explaining how underground nuclear tests are carried out.
North Korea said Tuesday it would restart a nuclear reactor to feed its atomic weapons programme, in its clearest rebuff yet to UN sanctions at the heart of soaring tensions on the Korean peninsula. Videographic explaining how underground nuclear tests are carried out.
Countdown and detonation of an historic underground nuclear test at the Nevada National Security Site, formerly known as the Nevada Test Site. This film footag...
Countdown and detonation of an historic underground nuclear test at the Nevada National Security Site, formerly known as the Nevada Test Site. This film footage depicts the shock wave emanating from the surface ground zero and the resulting surface subsidence crater formed when the subsurface cavity created by the detonation collapses.
Countdown and detonation of an historic underground nuclear test at the Nevada National Security Site, formerly known as the Nevada Test Site. This film footage depicts the shock wave emanating from the surface ground zero and the resulting surface subsidence crater formed when the subsurface cavity created by the detonation collapses.
North Korea is one of the most secretive and isolated nations in the world—but when it comes to military power, it’s anything but quiet. With one of the largest...
North Korea is one of the most secretive and isolated nations in the world—but when it comes to military power, it’s anything but quiet. With one of the largest standing armies on the planet, a growing nuclear arsenal, and advanced missile technology, North Korea is a force that commands global attention. But where does it rank in the global military power rankings in 2025? And what does that ranking actually mean for the world?
In this explosive video, we dive deep into:
💥 North Korea’s nuclear program – How many warheads does it have, and how far can its missiles reach?
🚀 Hypersonic missile technology – Why are these weapons a game-changer for global security?
💻 Cyber warfare capabilities – How does North Korea’s hacking prowess pose a threat to the world?
🛡️ Conventional forces – What makes its massive army and artillery so dangerous?
🌍 Geopolitical implications – How does North Korea’s military power impact the balance of power in Asia and beyond?
From its elite special operations forces to its growing naval and air capabilities, we break down every aspect of North Korea’s military might. By 2025, this isolated nation could become one of the most dangerous military powers on Earth. But what does this mean for global security, and how should the world respond?
🔔 Don’t forget to like, comment, and subscribe for more in-depth explorations of military technology, global security, and the stories shaping our world. Hit the bell icon to stay updated on our latest uploads!
💬 Let us know in the comments: Do you think North Korea’s military power is overhyped, or is it a genuine threat to global security?
#northkorea
#militarypower
#nuclearweapons
#warzone
#militaryvehicles
#militarytechnology
North Korea is one of the most secretive and isolated nations in the world—but when it comes to military power, it’s anything but quiet. With one of the largest standing armies on the planet, a growing nuclear arsenal, and advanced missile technology, North Korea is a force that commands global attention. But where does it rank in the global military power rankings in 2025? And what does that ranking actually mean for the world?
In this explosive video, we dive deep into:
💥 North Korea’s nuclear program – How many warheads does it have, and how far can its missiles reach?
🚀 Hypersonic missile technology – Why are these weapons a game-changer for global security?
💻 Cyber warfare capabilities – How does North Korea’s hacking prowess pose a threat to the world?
🛡️ Conventional forces – What makes its massive army and artillery so dangerous?
🌍 Geopolitical implications – How does North Korea’s military power impact the balance of power in Asia and beyond?
From its elite special operations forces to its growing naval and air capabilities, we break down every aspect of North Korea’s military might. By 2025, this isolated nation could become one of the most dangerous military powers on Earth. But what does this mean for global security, and how should the world respond?
🔔 Don’t forget to like, comment, and subscribe for more in-depth explorations of military technology, global security, and the stories shaping our world. Hit the bell icon to stay updated on our latest uploads!
💬 Let us know in the comments: Do you think North Korea’s military power is overhyped, or is it a genuine threat to global security?
#northkorea
#militarypower
#nuclearweapons
#warzone
#militaryvehicles
#militarytechnology
Japan and China said Monday they had not yet detected any atmospheric radiation from North Korea's nuclear test, amid fears of a leak from a "cave in" during th...
Japan and China said Monday they had not yet detected any atmospheric radiation from North Korea's nuclear test, amid fears of a leak from a "cave in" during the underground blast. Videographic explaining how underground nuclear tests are carried out.VIDEOGRAPIC
Japan and China said Monday they had not yet detected any atmospheric radiation from North Korea's nuclear test, amid fears of a leak from a "cave in" during the underground blast. Videographic explaining how underground nuclear tests are carried out.VIDEOGRAPIC
From "Atomic Journeys." Want to see more oddities from the annals of America's Nuclear Testing history? See "Atomic Journeys - Welcome To Ground Zero" available on Amazon video direct in HD. Notice: No cow was killed in this demonstration.
Cool shot of an underground subsidence crater. The hole created by an underground nuclear explosion forms a hole deep below the surface collapses, resulting in a crater.
If you haven't seen the 70th anniversary version of "Trinity and Beyond yet, check it out at:
https://www.reelhouse.org/atomcentral/trinity-and-beyond-70th-anniversary
According to intelligence reports, North Korea is preparing its third test of a nuclear device. The test would take place underground. In such tests, a nuclear device is placed into a drilled tunnel about 800 meters below the surface. The hole is then plugged with gravel and other materials to contain the explosion and fallout. The nuclear explosion vaporizes subterranean rock and sends seismic shockwaves through the ground. An underground chamber is created, which collapses and causes a crater on the surface.
Source: BBC
Subsidence Crater Formation
Historic underground nuclear test causes the surface to subside which forms a crater - seven such craters are used as disposal cells at the Area 3 Radioactive Waste Management Site. Provided by the US Department of Energy under Public Domain rules.
North Korea said Tuesday it would restart a nuclear reactor to feed its atomic weapons programme, in its clearest rebuff yet to UN sanctions at the heart of soaring tensions on the Korean peninsula. Videographic explaining how underground nuclear tests are carried out.
Countdown and detonation of an historic underground nuclear test at the Nevada National Security Site, formerly known as the Nevada Test Site. This film footage depicts the shock wave emanating from the surface ground zero and the resulting surface subsidence crater formed when the subsurface cavity created by the detonation collapses.
North Korea is one of the most secretive and isolated nations in the world—but when it comes to military power, it’s anything but quiet. With one of the largest standing armies on the planet, a growing nuclear arsenal, and advanced missile technology, North Korea is a force that commands global attention. But where does it rank in the global military power rankings in 2025? And what does that ranking actually mean for the world?
In this explosive video, we dive deep into:
💥 North Korea’s nuclear program – How many warheads does it have, and how far can its missiles reach?
🚀 Hypersonic missile technology – Why are these weapons a game-changer for global security?
💻 Cyber warfare capabilities – How does North Korea’s hacking prowess pose a threat to the world?
🛡️ Conventional forces – What makes its massive army and artillery so dangerous?
🌍 Geopolitical implications – How does North Korea’s military power impact the balance of power in Asia and beyond?
From its elite special operations forces to its growing naval and air capabilities, we break down every aspect of North Korea’s military might. By 2025, this isolated nation could become one of the most dangerous military powers on Earth. But what does this mean for global security, and how should the world respond?
🔔 Don’t forget to like, comment, and subscribe for more in-depth explorations of military technology, global security, and the stories shaping our world. Hit the bell icon to stay updated on our latest uploads!
💬 Let us know in the comments: Do you think North Korea’s military power is overhyped, or is it a genuine threat to global security?
#northkorea
#militarypower
#nuclearweapons
#warzone
#militaryvehicles
#militarytechnology
Japan and China said Monday they had not yet detected any atmospheric radiation from North Korea's nuclear test, amid fears of a leak from a "cave in" during the underground blast. Videographic explaining how underground nuclear tests are carried out.VIDEOGRAPIC
Underground nuclear testing is the test detonation of nuclear weapons that is performed underground. When the device being tested is buried at sufficient depth, the explosion may be contained, with no release of radioactive materials to the atmosphere.
The extreme heat and pressure of an underground nuclear explosion causes changes in the surrounding rock. The rock closest to the location of the test is vaporised, forming a cavity. Farther away, there are zones of crushed, cracked, and irreversibly strained rock. Following the explosion, the rock above the cavity may collapse, forming a rubble chimney. If this chimney reaches the surface, a bowl-shaped subsidence crater may form.
The first underground test took place in 1951; further tests provided information that eventually led to the signing of the Limited Test Ban Treaty in 1963, which banned all nuclear tests except for those performed underground. From then until the signing of the Comprehensive Test Ban Treaty in 1996, most nuclear tests were performed underground, in order to prevent nuclear fallout from entering into the atmosphere.
The last time underground nuclear tests caused earthquake-like tremors that shook buildings in Las Vegas, terrified guests flooded hotel switchboards ...There is no evidence to suggest that underground ...
... would probably strike Iran's nuclear facilities, most likely the Fordow Fuel Enrichment Plant, an Iranian underground uranium enrichment facility near the city of Qom, in the first half of 2025.