Analysis of information sources in references of the Wikipedia article "Duck and cover" in English language version.
Emergency Situations Ministry spokesman Vladimir Purgin said many of the injured were cut as they flocked to windows to see what caused the intense flash of light, which momentarily was brighter than the sun
...most can save themselves by immediately employing the 'Duck & Cover' tactic, rather than just allowing an impulsive rush to the nearest windows to see what that 'bright flash' was across town, just-in-time to be shredded by the glass imploding inward from that delayed shock wave blast.
...most can save themselves by immediately employing the 'Duck & Cover' tactic, rather than just allowing an impulsive rush to the nearest windows to see what that 'bright flash' was across town, just-in-time to be shredded by the glass imploding inward from that delayed shock wave blast.
Initially, this blast wave moves at several times the speed of sound, but it quickly slows to a point at which the leading edge of the blast wave is traveling at the speed of sound, and it continues at this speed as it moves farther away from ground zero
Individuals who sense a blinding white flash and intense heat coming from one direction should immediately fall to the ground and cover their heads with their arms. This provides the highest probability that the air blast will pass overhead without moving them laterally and that debris in the blast wave will not cause impact or puncture injuries. Exposed individuals who are very close to the detonation have no chance of survival. At distances at which a wood frame building can survive, however, exposed individuals significantly increase their chance of survival if they are on the ground when the blast wave arrives and if they remain on the ground until after the negative phase blast wave has moved back toward ground zero
Anything that casts a shadow or reduces light, including buildings, trees, dust from the blast wave, heavy rain, and dense fog, provides some protection against thermal burns or the ignition of objects. Transparent materials, such as glass or plastic, will slightly attenuate thermal radiation.
For surface and low-air bursts, the fireball will rise quickly, and within approximately one minute, it will be at an altitude high enough similar that none of the gamma radiation produced inside the fireball will have any impact to people or equipment on the ground. For this reason, initial nuclear radiation is defined as the nuclear radiation produced within one minute post-detonation. Initial nuclear radiation is also called prompt nuclear radiation.
I quickly lay flat on the ground. Just at that moment, I heard an indescribable deafening roar. My first thought was that the plane had aimed at me"..."I had no idea how long I had lain unconscious, but when I regained consciousness the bright sunny morning had turned into night. Takiko, who had stood next to me, had simply disappeared from my sight. I could see none of my friends nor any other students. Perhaps they had been blown away by the blast.
Initially, this blast wave moves at several times the speed of sound, but it quickly slows to a point at which the leading edge of the blast wave is traveling at the speed of sound, and it continues at this speed as it moves farther away from ground zero
...most can save themselves by immediately employing the 'Duck & Cover' tactic, rather than just allowing an impulsive rush to the nearest windows to see what that 'bright flash' was across town, just-in-time to be shredded by the glass imploding inward from that delayed shock wave blast.
Emergency Situations Ministry spokesman Vladimir Purgin said many of the injured were cut as they flocked to windows to see what caused the intense flash of light, which momentarily was brighter than the sun
Individuals who sense a blinding white flash and intense heat coming from one direction should immediately fall to the ground and cover their heads with their arms. This provides the highest probability that the air blast will pass overhead without moving them laterally and that debris in the blast wave will not cause impact or puncture injuries. Exposed individuals who are very close to the detonation have no chance of survival. At distances at which a wood frame building can survive, however, exposed individuals significantly increase their chance of survival if they are on the ground when the blast wave arrives and if they remain on the ground until after the negative phase blast wave has moved back toward ground zero
I quickly lay flat on the ground. Just at that moment, I heard an indescribable deafening roar. My first thought was that the plane had aimed at me"..."I had no idea how long I had lain unconscious, but when I regained consciousness the bright sunny morning had turned into night. Takiko, who had stood next to me, had simply disappeared from my sight. I could see none of my friends nor any other students. Perhaps they had been blown away by the blast.
Anything that casts a shadow or reduces light, including buildings, trees, dust from the blast wave, heavy rain, and dense fog, provides some protection against thermal burns or the ignition of objects. Transparent materials, such as glass or plastic, will slightly attenuate thermal radiation.
For surface and low-air bursts, the fireball will rise quickly, and within approximately one minute, it will be at an altitude high enough similar that none of the gamma radiation produced inside the fireball will have any impact to people or equipment on the ground. For this reason, initial nuclear radiation is defined as the nuclear radiation produced within one minute post-detonation. Initial nuclear radiation is also called prompt nuclear radiation.
In Hiroshima almost everything up to about one mile from X was completely destroyed, except for a small number (about 50) of heavily reinforced concrete buildings, most of which were specially designed to withstand earthquake shock, which were not collapsed by the blast; most of these buildings had their interiors completely gutted, and all windows, doors, sashes, and frames ripped out...While this saved the building frame, it permitted severe damage to building interior and contents, and injuries to the building occupants. Buildings without large panel openings through which the pressure could dissipate were completely crushed, even when their frames were as strong as those which survived...most of the reinforced concrete structures could be classified only as fair, with concrete of low strength and density, with many of the columns, beams, and slabs underdesigned and improperly reinforced. These facts account for some of the structural failures which occurred [sic]
