How did Hiroshima Survive being Nuked?
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- Опубликовано: 8 июн 2024
- Where did the Radiation from Little boy, and Fat man go? Initially, I thought cities hit by Nuclear weapons would be radioactive for Thousands of years - and yet they rebuilt Hiroshima in six years!
It's amazing that the Japanese government was able to organize such extensive rebuilding efforts, despite all the dangers present on land that was hit by an atomic bomb, weeks earlier.
We hope this video explains how radioactive fallout disappears, and exactly why it's dangerous.
Lots of research went into making this video, thank you for watching! 
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My great aunt was from Hiroshima. She was 14 that day and saw the bomb detonate from her home, fortunately her family lived on the outskirts of the city far enough away to survive the destruction unharmed! This summary and presentation is very accurate and very well done!
I visited Hiroshima in 1973 and again in 2019: one of my favorite cities in Japan for this now old retired U.S. Navy chief petty officer. In 1973, as a young sailor, I was very, very lucky to meet a lovely, intelligent Japanese girl who gave me a two-day tour of the city, the museums and memorials commemorating the bombing and show me how Hiroshima bustled with life. What I saw at those memorials tore at me in ways I could not begin to explain then or now. But I was in awe to be shown around by such a lovely young woman and visit a place filled with life and peace. I went again with my wife in 2019 and remembered that girl and the wonderful "cook's tour" she gave me. Again the people my wife and I encountered on our visit were just as friendly and laid back as on my visit decades ago. One stop we made was to take a boat ride on the moat surrounding Hiroshima castle. We had the boat to ourselves, so our lady guide explained how the castle was rebuilt and how the trees at and around the castle came back to life. She was happy to explain small details that illuminated how this one historical spot was nurtured back to life. We also enjoyed riding the famous streetcars that -- within a day or two of the bombing -- were back in operation and are still proudly serving the residents. What a great city it is, today: small enough to be walkable; large enough to show it's pride in rebuilding and remembering it's past! Many happy memories for this old guy! Thanks for showing this video.
Thank you for your service, and for sharing your thoughts and memories.
I find it shocking how fast cities can rebuild back. Like SF after the big earthquake. They had an iconic World's Fair like nine years later. Makes you wonder how many other outwardly 'intractable' problems we could solve in a year or two with the right priorities.
Well those cities had only about 400,000 people its alot different than now days with a city of 10 million.
@@jonmitchell9019more workers too
@@rodschmidt8952 totally agree most of those cities was blue collar working no welfare or unemployment benefits so you worked or starved so basically 390000 out of 400000 worked.
Then you look at African cities that inherited advanced infrastructure at independence and destroyed it.
Humans are much more resilient than we give ourselves credit for today.
I remember when I was younger and learning about Hiroshima, wondering if it was still uninhabitable like Chernobyl, then going to Google Maps and surprisingly finding it as bustling as any other city.
True! For most of my life I thought Hiroshima was on the same boat as Chernobyl in terms of long term consequences. There are a lot of misconceptions about nuclear fallout in our cultural consciousness.
@@_louvadeusa_ the key important part... it was a "baby nuke" compared to most that are fielded these days; so even though some fallout happened, it was "just" an a-bomb (not an h-bomb) and a really small one.
It wasn't so much the size of the nuke but rather being an air burst which meant basically the only fallout was the parts of the bomb itself. Crossroads Able and Baker shots demonstrated this perfectly, both were about the size of Nagasaki. Able was an air burst and there was virtually no residual radiation which meant workers were able to go onto the test ships and check them / reset tests and such. Baker was an underwater burst which created a massive cloud of highly irradiated salt water that made going onto most of the test ships impossible for months afterward.
Time is also a big factor, all the really hot isotopes also thankfully burn off in seconds to months and it's only some isotopes of cobalt and cesium that have half lives of years that are the biggest problem for fallout.
@@chouseificationNuclear yield doesn't always equate to more fallout. Mainly because we do fusion bombs now. It is mostly dependent on weather and if it is detonated as an airburst.
@@nathanielmathews2617 please don't try to 'splain such basic stuff. Yes, understood that as a pre-teen many decades ago. My comment was a response to the very specific post made... realize that before banging reply and embarrassing yourself by trying to "well actually". Really. Same to previous poster. Wow, some of us were the guy who drew Gadget on our physics class chalkboards back in the 90s and the prof immediately knew who had done it, yet if you dare to not write a damn essay people pretend what you said was somehow wrong. It was not.
Mate I was expecting this channel to have a few hundred thousand subs at least😅
Seriously great vid with clearly alot of effort put into it!
It also dawned on me in my contemplation that the reason the Japanese were so adept at recovering and didn't wallow in the horror was because by that point in the war we'd been fire bombing Tokyo and other major cities sometimes killing over 100,000 n a single day, so while the destruction of this one particular bomb may have been novel, the citizens of Japan by this time were no strangers to the horrors of war
Any disaster in the US triggers looting and riots, with the residents of major cities just looking out for themselves. Any call for volunteers to help will be met mostly with indifference.
@@wtf3883 why should you show up when the government calls if they never show up when we call? Case in point: Hurricane katrina, flint water crisis(still happening to my knowledge), gulf oil spill.
@@drswaqqinscheckingin7210 least treacherous american
@@drswaqqinscheckingin7210 the least competent governor:
seriously though, in Hurricane Katrina the governor was literally stupid or otherwise he was in shock and did not know what kind of protocol or paper to sign to enable/officialese to national guard and volunteers in where the National Guard units and rescue and cleanup Volunteers were literally begging the governor of New Orleans to let them help! It was indeed treachery by the New Orleans governor to only let the city's first responders struggle in the cleanup in the first four days
@@drswaqqinscheckingin7210 I would show up because it is my home, these are my friends and neighbors, and I know that we cannot depend on the government. Unlike many here (including yourself based on your response), I would not be kicking in my neighbors door to see what I could steal.
I had the opportunity to visit researchers at The Effects of Radiation Center in Hiroshima, set up by the US after the war at the time filled with researchers from the US and Japan. I read a lot of their published research. The truly amazing thing was how little LONG-TERM effects they picked up in the way of excess cancers, presumably from the radiation. Yes, the blast and short term radiation killed tens of thousands of individuals. But long term cancers less than 0.05 % increase from residence who survived the blast. It was certainly not what I had expected. The levels proved to be so low that at the time I visited back around 2010(?) they were about to close the research center down for lack of causeational effect.
Sounds like nuclear weapons should be in common use with today's military since many of the negative side effects are extremely low.
Sounds like nuclear weapons should be in common use with today's military since many of the negative side effects are extremely low.
Sounds like nuclear weapons should be in common use with today's military since many of the negative side effects are extremely low.
There are no Nuclear Weapons.. New Clear Energy comes from Hydro Turbines. Also all wars are fake.
@@Menaceblue3 You mean other than the ability to kill millions from blast, radiant heat, and neutron radiation. Other than that they are perfectly safe I guess.
About 12 years ago I visited Hiroshima. I visited the skeletal dome building and nearby museums and shrines.
The most eerie thing was to actually stand in the middle of the Y-shape bridge that was the bombardiers target. It is still the original bridge, only the railings were knocked off but because the blast was straight down on the pillars so it survived otherwise intact. The bomb burst 1500 meters above the spot I stood on that day. The skeletal dome building, a local commercial wholesale marketing facility, was one of few buildings to survive even partially near the blast center.
I took many photos in the museum and later showed them to my father, a retired army officer and veteran of the Pacific War. It was one of the few times he was willing to talk about some of what he saw when his unit accompanied the scientists who first entered Hiroshima some weeks after the surrender. He passed away not too many years ago and it was the only time he was willing to talk of some of what he had experienced.
Only those who saw or experienced can truly understand.
But today it is a modern and beautiful city in a wonderful country. I have been to Japan 5 times and love the country and people.
A very smart adult told me when I was a teenager and going through a terrible time that “when you don’t know what to do to do what you know to do”. I didn’t understand what she was meant at the time. I actually thought it was kind of dumb. But what she said to me that day stuck with me and when my dad died in my 20’s I finally understood the meaning. It means when you don’t know what to do about a hard situation going on in your life that you keep doing what you know to do (exactly how it was said 😂 😂.) Keep doing what you’ve been doing in your daily life and routine. It was an ah ha moment. Like when my dad died I didn’t lay down and go into a severe depression. I kept doing what I needed to do like planning his funeral and closing his bank accounts and making sure my mom would be okay and wouldn’t have to deal with all of that. I was so proud of myself. I was sad but I never went into the deep depression that I was prone to. I said all of that because I think that’s what the people of Japan did and the people in Europe did during WW2. They didn’t lay down. They got up and did what they knew to do which was rebuilding their cities.
I hope this can help someone else like it has helped me through out my life.
The number of ads in these videos is revolting.
so there are still people not using adblockers? seriously?
They really trying hard to give away 6400$ for free
Or wait that 16 grand the government just gon give up ya know jus cuz that won't drive inflation
Dumb ass Google tube ads
One of the greatest legacies of that bombing was how the Hiroshima Electric Railway (Hiroden) managed to salvage and rebuild two electric trams, #651 and #653, back to working order in a few years just after the war. Both operational even now, those two trams represent the amazing rebirth of that city.
Hiroshima Municipal Stadium was where the Carp played from 1957 to 2008. Home plate was about 600ft from the Atomic Bomb Dome.
Such a well researched video and a underrated channel
The Little Boy exploded 1950 feet above the ground at Hiroshima. It was intended to do that because those of Project Manhattan thought that the ground would absorb some of the bomb's power. They felt that an airburst was better in that respect. As a result, the Little Boy's fireball never touched the ground. If it had, A LOT of radioactive debris would have created and then spewed out over long distances.
WOW, I've lived in Japan 51 years but learned a lot from this video. You might try to say "hee-BAK-sha" because the "u" is almost silent (not "heeba KOO sha").
Should be “hee BAK sha”
Because it didn't. No ground zero and no radiation.
Great video! You managed an actual explanation of radiation that didn't make me wanna die. Also, I had never heard of the delay of medical care to the Hibakusha, seems like a contingency of the bomb that tends to be glossed over.
1. Realize that Hiroshima was supposed to be an air burst that would have produced only prompt radiation. The fireball did touch some structures. This minimized fallout. 2. Years later it was determined that the bomb created a focused beam of neutron radiation which caused fatalities much further away than expected in the direction of the beam. (Source a Health Physic Journal Article from the late 1970s or early 80s, I have it somewhere filed). 3. Yes, it caused very little fallout, even the black rain was largely ash from the fires. 4. The bomb was about 2 KT larger than what was believed at the time, the bomb was reassessed later. (Health Physics Journal Article) 5. Open cooking fires and the constructure of the buildings caused the fires besides the blasts heat; made worse by the burst gas and water mains, destruction of fire fighting equipment and death of fire fighters, and finally debris clogged roads. 6. Even some of those who died actually died because of their malnutrition and the existing endmic diseases which meant thst many died from their existing diseases or injuries due to their immune systems being damaged by radiation, however, healthy people would have survived that level of exposure in a number of cases. 7. Outside medical aid and needed supplies (very short supply) could not reach there easily; the national transportation facilities had been badly damaged by US bombing. There was a book on the medical findings in Hiroshima (rather dispassionate) by competent medical authorities. 8. The Japanese government fatalities from Hiroshima should be viewed with caution. Many from Hiroshima did not report themselves as being there; my wife's mother for example out of fear of discrimination in finding spouses for example (she had dn in the "Black Rain" and helped clean up, she was past 90 when she died and never experienced any issues from radiation ). The other reason was that if you were anywhere near the bombed cities, and you developed cancer, they blamed it on the bomb. Japan guilt tripped the US for years over the A Bombs blaming all sorts of woes on them.
A classic case was Minimoto Disease, where it was finally acknowledged to be mercury poisoning from a paper mill getting into the foid chain. They needed the tax money and jobs, so let them get away with it for years. The myths about it have always been useful for scaring people.
Good emergency planning, adequate stock piles of food and medical supplies, other needed material in a safe location; as well as adequate shelters could reduce deaths. In 1971, I saw 12" blast doors on Tokyo subway tunnels and they were storing rice in mountainous areas. They learned their lesson.
Sounds like a case of where the living were jealous of the dead. I feel that way anyway!
@@arthurmosel808 Excellent info, thank you for your comments. My father was in Hiroshima a number of weeks after the surrender as part of the guard unit for the US scientists who first went to the site . As far as I know he never suffered any physical effects and died at 100+ years of age. He also never talked about it until after I went there and showed him the photos from my visit about 10 years before his death.
@@We_Seek_Truth i met people in Japan who lost family in the bombing, including members of my wife's father's family, including my mother--iin-law. I never met one sorry to have made it through the war. By the time Hiroshima was bombed, we had fire bombed or heavily damaged all but 16 Japanese cities. In Tokyo in one night's fire bomb raid we killed 100,000 plus with an intentionally planned fire bombing.. this was necessary because unlike Germany, much war production was done in small factories and shops scattered throughout the cities and then shipped for assembly.
Another point, starving Japan into surrender might have worked but would have taken months and been more genocidal than what we did. Officially civilians were to receive 1500 calories per day. In many areas, the actual amount was less. My wife'smother and her immediate family were out in the countryside bartering their property for food when the bomb went off. Despite much of Japan being near the sea, sea food was hard to get since the US was destroying even fishing boats. On land rail lines, roads and bridges were targeted, so medical supplies and food were difficult to obtain in some locations because there was no effective way of moving them.
Finally, I suggest you read about the Japanese defense plans for invasion. These amounted to mass suicide give what weapons the population was given; as well as poison pills for women in the upper classes.
In the US and elsewhere, the non-Atomic horrors have been minimized while the A-Bomb sensationalized. I doubt if the fire bomb survivors felt much different then those who survived the A-Bomb attacks.
Excellent report. Good information without all the emotional stuff that most use when talking about this subject. This way we can better understand what really happens. By the way: My 2008, Mazda Miata Retractable Hardtop was built in the Hiroshima plant. Happy Trails
Excellent research! Fascinating and inspiring history!
Excellent Research!
Thankyou Laurent. Fantastic video
Bro your goated, underrated. If you continue with videos like these, milly subs for you. Very detailed and understandable
Super high quality vid, love it
Good explanation to a question I long had no answer for. Your photos and videos of Castle Bravo, however, were actually those from Crossroads Baker, a 20kt Fat Man (Nagasaki) type weapon detonated under the water in Bikini Lagoon amid a fleet of target ships. There was extensive residual radiation from this test also.
Excellent presentation.
EXCELLENT video. Thanks for a very balanced report.
Thanks for sharing this.
It was a air burst which is more destructive but releases less radioactivity then a ground burst which basically sucks up all the dirt and debris and irradiates then and throws them out over the a large area
great video.
i binged all of your videos in the last day.
you started good and improved every video.
so much great research and production.
keep up the good work and i wish you all the best for the future of the channel.
it's only a matter of time till this channel blows up and gets the reach it deserves.
Epicenter means "over the center". The point under the blast is generally called the hypocenter, meaning "under the center".
Any American service member who was in Hiroshima or Nagasaki, even if just driving thru, is eligible for a $75,000 bonus from Congress. If the member has passed, their descendents (1st generation) still qualify.
Retired librarian and trivia lover
Good content. Subscribed
Good video! I hear music from the original X-Com and I think that's Metal Gear Solid 3 at around 11:00.
Very nicely presented.
EXCELLENT! Thank you for such an outstanding, comprehensive, and informative video. By far the best I have ever seen on the subject.
amazing educational channel bro, keep it up
Would it be possible for you to make a video of what exactly the world knew or thought it knew about the impact of the atomic bomb before the bombing of Hiroshima? So many programs make harsh judgments of those who dropped it, assuming that they knew then what we know now.
The Australian forces occupied Hiroshima, and in something of a contest with the Americans in the north, we’re out to show what they could manage with the Japanese to rebuild and to reform them to be civilised.
When I walked down the gangplank in Yokhama, in 1945, the city was in ruins as far as the eye could see. The magnesium bombs did terrible damage. When I left 14 months later, one could not determine it was previously leveled. War makes people to be at their worse. Coming, I was 17 and influenced by all the war movies and had hatred in my heart. Leaving, I had a love for the Japanese people and enormous respect. Recently, I saw a picture of Hiroshima all lit up at night. It was beauiful. Then, I saw a picture of Detroit and the condition it has come to. The only thing that gives me solace is my belief that our Intelligent Creator loves us ALL and has healing and many wonderful things in store for ALL of us. Cheers.
Really great job on this, I learned a ton, maybe a kiloton. Thank you
What we did to the Marshall Islands and the experiments on those kind, innocent people is incomprehensible, and almost unknown in the USA.
Background music from XCOM UFO Defense!!! That was a good choice :)
This video production deserves much more exposure, it's well put together, the images go well, a real person narrating superb natural room reverb and not that usual massive huge microphone in foreground that is common
the detonation was an air burst, with very little radioactive material, the one thing which most people are not aware of is the torrential rain that fell every day for about a month
The comparison of initial radiation exposure to a sunburn is partly accurate, except it is INTERNAL as well as topical. As for the residual (fallout), that is mostly topical contamination (except for inhaled dust). The largest amount is carried downwind AWAY from the site of the explosion.
For survival, CLEAN WATER (bottled, canned or drawn from wells) is essential. Food is similar. Canned is best.
Great video I understand everything that you said. But I have one question to ask you to noble. How come Chernobyl is still uninhabit to today? And if you could do a video on that.
Weapons grade uranium is extremely deadly but has a short half life. Most of the games radiation is reduced to safe levels in a few weeks.
Powers plants use uranium that is not enriched to that level but it's halflife is thousands of times longer. Plus the amount of Uranium in a warhead is nothing compared to the amount in a power plant. And the power plant exploded on the ground throwing up radioactive debris. All of these things make Chernobyl a dangerous place today.
Ocham´s razor: No nukes were ever dropped over Japan
The Hiroshima bomb was about 64kg of uranium. Chernobyl was about 2660kg of uranium and plutonium.
The "nukes" were likely simple photoflash-bombs dropped by lone B-29´s few hours after 400 bombers had pounded the cities with incendiaries. Japan´s surrender was due to US promising to protect the emperor, and to avoid a split between Russian and Chinese occupation zones. They simply needed a fish story.
en.wikipedia.org/wiki/Photoflash_bomb
This is great. Came up on my recommended. You should have a lot more then 250k-ish subs. Advertise this stuff!
A nuclear explosion is relatively clean. Most of the fissile material is well, used up and leaves stable products. I think the guidance is two weeks to stay inside and keep the dust from entering your home if your home still exists. This is compared to a catastrophic reactor meltdown that has thrown chunks of reactor fuel into the environment. (We've only ever had one meltdown that did this) That stuff sticks around and is what uninformed people think happens when a nuke is detonated. Also as a side note, radiation is not as devastating to the environment as we're told it is. It's devastating to humans specifically as every single species of life on the planet plant and animal short of microbes handle radiation better than we humans do. And we tend to project this flaw onto everything we see around us.
Beautiful video. Thank you for all your hard work. Eva
One of the most fascinating videos on RUclips. I fear quoting it without documentation, but I don't have reason to doubt it. I do want to tell people about this. The topic of war is a big thing with me. I'm a veteran and believe in Readiness.
-- For those who wonder why they would rebuild at the same site, THERE WAS AN INFRASTRUCTURE. Buried water, sewer, electrical, etc. It still had great value. the fact the water & electrical system could be restored so quickly proves this.
-- This video kind of says it, but where did the radioactive dust go?... The spectacular heat that causes the mushroom cloud (hot air rises) acted as a giant vacuum cleaner and took the dust UP, where it drifted away with the wind. Being an Air Burst bomb, this effect is greater than one that was on or even penetrated into the ground.
-- On a related note. look at the THEN & NOW photos of Hiroshima and Detroit. ("related" because Japan now makes our "American" cars.) 🤣
Go to Hiroshima castle there still is a tree that survived the bomb in only 850m distance. They have a sing on it so you can read its history. The free moved me as much as the peace museum because it shows the size of the tragedy which can't be estimated when you just walk through the city.
That was the Baker Shot, not the Bravo Shot, as you labeled it. The video, I mean. Your information about Bravo is correct. But the blast with the ships was Baker.
Woah. This is an amazing channel.
Interesting. Well done
My dad was sent to Nagoya Japan to help with the rebuilding of Japan after the war
Nice video
Sea water seems to make the radiation become less toxic and it becomes high radio back round that we can survive
Important info!
Retired nuclear engineer and health-physicist. A few facts you conveniently left out. You throw the term "radiation" with reckless abandon. Radiation is just like light, only of a different wavelength. It travels in a straight line until it hits something dense enough to absorb it. Radiation is emitted by radioactive materials. Correct terms include "radioactive material", "radionuclide", "radioisotopes" or "activation products".
Very few fission products were produced. Little Boy was a uranium gun-type bomb. This type of bomb is very inefficient. The yield is now generally accepted as 16kt. The bomb contained 64kg of U-235 but only about 0.7 grams were converted to the energy that constituted the explosion. Thus, negligible fission products were produced. These fission products were carried away from the city by the winds.
The explosion was an air blast, detonated at an altitude calculated to cause the most damage. The fireball did not touch the ground so no dirt was sucked into the radioactive cloud. The little radioactive material on the ground were neutron activation products which quickly decayed away. US soldiers and scientists were on the ground the day after japan surrendered. They were completely safe from radiation or ingestion of radioactive material.
The big pink elephant in the room that you didn't mention because it didn't fit your apologist agenda is that the US (mostly, with minor Allies contribution) paid for the reconstruction of the two cities just like it did in Europe under the Marshall Plan. Remember the photos of the devastation but with the roadways cleared of debris? You don't really think that was done with surviving japanese equipment, do you? The Army Construction Battalions were in the city a few days after the surrender.
I like how he used X-Com UFO Defense's geoscape theme 😄
I thought it sounded familiar!
You did a great job explaining how Hiroshima rebuilt etc…disappointed you didn’t contrast that against why Chernobyl is uninhabitable for millennia.
People DO live there 😂😂 there ARE families who went back to live where they used to live
Lotta dust got ejected into the air at Chernobyl plus there was much much much more nuclear fuel spouting particles into the air. Not having a containment unit to catch that dust was why Chernobyl is so much worse than Fukushima.
To my knowledge, there has never been a test of continuous repeated air bursts, which, if nukes were ever to be used again, might be how it plays out…
My mother had a colleague (and friend) who lived in Kure, about 20km from Hiroshima, as a child. She was 5 at the time of the blast. She developed lung cancer in her 60s and it later came back in the form of a brain tumor. The source of the initial cancer was a bit strange.. Neither her nor family members were smokers. Only tobacco smoke exposure was in workplace staffroom. Not very polluted area either.. Maybe radon in her home?
Smokers aren't the only ones with lung cancer, in fact 20% of lung cancer are non smokers. Most likely the lung cancer metastasized and spread to her brain (common with some types of cancer).
it's still there
Does anyone know what happened to all the radioactive material during the recovery of the contaminated cities??
Goodness ... need to play this at 1.5 or maybe a notch up.
ADHD?
The XCom soundtrack is strong with this one
My friend and I were in Nagasaki a few years ago and at the ground zero museum my friend's camera would not flash and it always worked before and since but 60 years later there had to be some residual radiation to cause the camera to not flash.
Radiation is nasty stuff. 15 years after treatment for cancer I am experience bone and nerve death in my neck and jaw. It is chronic and will never get better.
Without the radiation treatment, you'd probably already be dead. The side effects remind you every day that you're still alive.
I knew most of the stuff (go me) lol... But you made a lot of it clear and fresh. Visually too! Thank you!
This is an amazing story, and should be told. more widely. I met Japanese woman living in Florida who was a child raised on the outskirts of Hiroshima. She suffered no health damage I know of, and is still alive in Florida in her 90s. However, he father died of radiation sickness. I was sorry the video mostly ignore Nagasaki.
Seems they got general services back quicker than New Orleans after Katrina. Thanks Bush!!
Feds are not in charge of utilities. That’s local. Nothing feds can do.
Bush? Why is the federal government being blamed for local and state government failures? Oh...I know...anything to say something negative about Bush...got it.
A couple of years ago we vistied the Trintiy Site, where they tested the first nuclear weapon in New Mexico, and the reaction we got from some of our firends about how crazy we were to visit such a dangerous place, they had no clue about how nukes actually work. Would I sit on the ground and have a picnic? Probably not, but it's not going to kill you.
What were your sources?
Both were very high air bursts. So there was much less fallout. And the radiation disappear in a few years.
Ok, I get a ground burst throws a ton of dirt into the air & irradiates it, but I still don't understand the difference because the same things that irradiated the dirt are still there & SHOULD fall to the earth, no ?
No. Long-term radioactivity is only induced when the material has been ionized. The radioactive materials transported by the mushroom cloud are dispersed over a wide area raising the background radiation but not to a significant level. Roughly 80% of all residual radiation will degrade through decay within 24 hours. Research has indicated that 24 hours after a bomb is detonated the radiation is 1/1000th of the amount immediately after the bomb was detonated. The rule of thumb is that for every sevenfold increase in time after the explosion, the radiation dose rate decreases by a factor of 10.
@@buckhorncortez oh, ok. I didn't know that. Thanks !
I understand that a long half-life means that a few particles are escaping in a period of time, but a short half-life means that you'll have to evade many particles in that same time period. More dangerous.
Those bombs were not like the thermonuclear bombs we have now. The weapons we have today are boosted to produce way more explosion and salted to produce more fallout. The Japanese were hit with weak prototypes, basically. Now it would be so much worse.
How are thermo nuclear devices currently in the arsenal "salted"? They could be made that way, but they're not as it is a disadvantage for troops coming into the area.
Where did u read that?
Hiroshima is still thriving and Detroit is a wasteland. See the irony there?...
No.
Yes. And I would say it is because the United States has literally spent trillions of dollars on wars across many generations while its once great cities crumble. Think about how many conflicts now--Viet Nam, Afghanistan, Iraq, Ukraine, and I'm sure many more will come too in the future.
I can’t stand when people say Detroit is a wasteland. And probably never even been there. I’ll tell you this, Detroit isn’t a wasteland. Certain parts of the city are abandoned, but 70% of the city is intact, and they are building up downtown as we speak.
@@Eastsidet03 So 'only' 30% of Detroit is a wasteland? Good to know...
@@spyderlogan4992 ur momsa wasteland
You: All this can be explained in 20 min.
Also you: *releases 25 min video*
Interesting
Good video. If you tested my body you'd see that I was alive during atmospheric testing of nuclear weapons. (Probably residual strontium 90.) We did that duck and cover stuff in school. By the time I got to high school in the 1970s, the situation had atrophied to "Would you rather be a communist slave?" versus "Chicken Little, Chicken Little! there's not a thing you can do." My fellow left wing friends in high school and I decided, we didn't like nuclear war, but we'd duck and cover if that's all we could do. Why not?
What we were never taught was that if you stayed inside sealed up as best you could for four days, you'd likely not suffer any significant radiation. I think that's useful information. I don't think we knew that at the time of the Hiroshima bombing. (We did drop leaflets to leave the cities, but...who's going to believe the enemy?)
Something else. When I watch the SpaceX launches from Vandenberg here in California, I know I can see the rocket for about 5 minutes and that after about 25 minutes it's over the South Pole, about the same time it would take a Russian ICBM to reach Los Angeles.
I was in Japan again earlier this year. I knowingly selected a Tokyo hotel in the area fire bombed March 9, 1945, Operation Meeting House. There's a debate whether this raid or the two atom bombings killed the most people. Doesn't really matter. A lot of people died, almost all of them civilians. When you see old buildings in any city in the world and they've got a layer of black grime -- that's probably coal soot. When I saw old foundations poking out in that area of Tokyo that were blackened I wondered if it might be something else. But when I thought about it, a couple of days of fires verses at least a century of burning coal?
What I respect about your video is the point you make: people are resilient, given half a chance they will help each other, do their jobs, rebuild. The winter of 1945-46 in Japan a famine was expected, at least a million Japanese civilians would've died. Two weeks before Japan surrendered the Emperor's war council had on its agenda, "100 million glorious deaths.' Basically telling the entire Japanese population (not actually 100 million) to commit suicide. They'd already done this on Okinawa. Did the bombings shorten the war? The best analysis suggest it contributed about 25% to Japan's decision to surrender. What also happened was when the Allied military occupied Japan, they didn't behave like so many other armies of that period -- especially the Japanese Imperial Army whose official policy in China was Kill All, Loot All, Burn All. They brought in as much food as they could and kept bringing it. It's best to be resilient together.
An important point to note is that the rest of Japan was getting firebombed... and the effects of that were as bad or worse. If you go to the museum in Hiroshima, you can read accounts of school kids being put on work details to cut firebreaks in the city... that means ripping out lines of houses. The idea was to reduce the spread of the firestorms caused by bombing.
By the time the British, Canadian, and American bombers had finished with Germany, they had perfected the art of lighting cities on fire. Japan got it bad. All the cities were burning. People in Hiroshima were wondering why they hadn't been hit yet. It was because the Americans wanted to leave a few pristine cities so they could find out how well atomic bombs worked.
As noted, it was the fire and blast that killed most people rather than anything special about the "atomic" part of the bomb. Does it really matter if it's a bomb with a 15,000 ton yield when the normal bomb capacity of a B-17 was 4 tons, a B-29 10 tons? When they sent flights of as many as 500 hundred at a time for days on end? When city after city was engulfed in firestorms that left nothing?
They resettled Hiroshima quickly because it was as good as anywhere else.
This video does a good job of explaining how Hiroshima and Nagasaki were able to bounce back from these atomic disasters so quickly. Thank you for creating such an educational video! Throughout all my studies of Japan and its history, I have never encountered such thorough analysis.
My only issue is that Nagasaki’s experience is too often overshadowed by Hiroshima’s in media and history, and I wish there had been equal discussion about both cities. The bomb’s effects on Nagasaki were different, with damage and casualties less than that of Hiroshima, but I believe knowing why is important and its story is just as critical as Hiroshima’s.
I lived in Nagasaki for three months on summer and so glad I had the opportunity to learn first-hand how its history was different.
I read about a man who survived Hiroshima and got the hell out of there as fast as he could. He got to a safe city called Nagasaki. He survived yet again. I am not sure if he is the only one but what a story.
Truth is that there is really nothing much past the initial destruction and radioactive blast that will actually kill you .Its not as deadly or long lasting as most people thought because millions of people lived downwind their whole life even here in the usa and thrive and live .Life is still growinga nd thriving at Chernobyl and around Fukushima and three mile island . Truth is if you can avoid the explosion its self and then direct fallout contact and stay clean of fallout for a week or two you will likely be just fine .
So what happens if your enemy uses a ground burst hydrogen nuclear weapon?
@@WilliamMurphy-uv9pm Same result actually if your talking radiation time reduction .The explosive range is much bigger is all .
Wasn’t Castle Bravo 15 megatons?
Lest anyone think we could survive a full scale nuclear war imagine this: weapons that are at least 40 times as powerful as the one dropped on Hiroshima dropped on 100 large American cities. Many millions of people would die instantly and the blast would completely destroy all structures within a ten mile radius. Such a war would utterly devastate our country and ultimately kill over two thirds of our population. To rebuild what was destroyed might take a couple centuries.
I gotta wonder if Bechtel was in on this reconstruction 🤔
10:01, oh wow
It wasn't the coral that caused the fallout from Castle Bravo. The water particulates that were blasted into the air became ionized with the harmful Iodine-131 and Strontium-90 which are the two most severe but have the least half life of the radiation poisoning ions. The coral would have been harmful also, but was less than 2% of particulates following detonation, compared to tens of thousands of gallons of seawater ejected into the air.
15:18, why?
Because it was firebombed instead? Check out the book Hiroshima revisited by Michael Palmer
I need to take physics classes... then come back to this clip
The bombs were relatively small and not ionized the way modern ones are.
That's not true. Gamma rays are produced by both fission and fusion bombs. Fusion bombs are larger so they produce more gamma radiation. They are somewhat "cleaner" in that a larger percentage of the fissile material is used meaning a smaller percentage of unused fissile material is dispersed as fallout. The unused fissile material is evaporated by the heat and gets mixed as radioactive vapor into the mushroom cloud.
Typically japanese resilience. This is an amazing story I had never heard of. Thx.
Anyone else recognize the XCOM 1 music in the background ?
Consider that the bomb was detonated at something like 900ft. So the fireball never actually touched the city beneath. If it had of, then, no, people would not have returned so soon. The energy released is pretty much 100% gamma. This then cools through xrays, uv, visible and then infrared. Most of that is over in the first few miliseconds. The actual detonation is over in microseconds. The rest is just nature trying to dissipate all that energy concentrated in one spot. As it expands outward it cools. It is the uneven heating which causes the wind gusts and the rapidly expanding ball of super heated air and gases which forms the blast wave/pressure front. It's not really even an "explosion" as we typically refer to them. Its just a big dump of heat. Thermo-nuclear detonation is more accurate than "explosion". If you search and find videos with the real uncut audio from a test you will be very surprised by how the sound. It's just a "crack" followed by an ascending rumble as the winds and blast thunder across the dessert.
You would just love living in present day Pripyat :)
A better question would be, how did the USA survive 110 above ground explosions in Nevada, and the fallout which spread across the US.
4:30 the map doesn't highlight all of the Japanese islands
It is the Bogie man - sold a line. Look to see what the fire bombing did.
13:17, good to know