Little Boy, Hiroshima, had a yield of ~15,000 tons TNT, not 15 tons.
Possible largest known bomb is Russian at 100Mt, that's 100,000,000 TNT
If you're feeling inclined, you can simulate the effects of various sizes of bomb hitting a location of your choice at
https://nuclearsecrecy.com/nukemap/ at any altittude.
The effects are far more complex than dead/not dead at any particular distance or time or wind direction or terrain.
Linked is an example a 150Kt bomb (Russias most common bomb at particularly damaging height) aimed at Sydney harbour bridge -
https://nuclearsecrecy.com/nukemap/?&kt ... ,5,1&zm=11It has minor short term effects beyond Ryde, Manly and Maroubra albeit with Estimated fatalities: 110,840 and Estimated injuries: 351,390
Re: Longer term fallout effects - It's complicated & affected by peoples actions, height of detonation, wind, etc - see
https://nuclearsecrecy.com/nukemap/faq/#falloutIt mentions -
Airbursts do contribute to long-term fallout (e.g. the overall radioactivity in the atmosphere, or the amount of cesium-127 that eventually makes it into human diets at very, very long distances), but, by and large, contribute only negligibly to short-term local fallout.
The line between an "airburst" and a "surface burst" in such a consideration is whether the fireball touches the ground, as this pulls up significant numbers of heavy particles (e.g. dirt, coral, buildings, people) into the rising fireball, and these heavy particles affect the "falling out" considerably.
What can you do after a nuclear event ?
My favorite free chatbot
https://perplexity.ai suggests -
In the aftermath of a nuclear detonation, the first 3 to 4 days are critical for ensuring safety and minimizing radiation exposure. Here’s what you can do during this period:
Immediate Actions (First Few Hours)
Seek Shelter:
Go inside the nearest sturdy building as quickly as possible. Ideally, find a structure with brick or concrete walls, or head to a basement if available.
Stay indoors for at least 24 hours unless instructed otherwise by authorities. This helps protect against radioactive fallout, which can settle on surfaces outside.
Seal Your Shelter:
Close windows, doors, and ventilation systems to prevent outside air from entering. Turn off fans and air conditioning that draw in outside air.
Stay Informed:
Listen to local radio or emergency broadcasts for updates and instructions from authorities. Follow their guidance closely.
First 24 Hours
Limit Movement:
Remain indoors and avoid unnecessary travel. The highest radiation levels occur shortly after a detonation, and staying put is crucial for safety.
Decontamination:
If you were outside during or immediately after the blast, remove contaminated clothing and seal it in a plastic bag to prevent spreading radioactive material.
Wash your skin thoroughly with soap and water to remove any fallout particles. Avoid scrubbing too hard, as this can irritate the skin7.
Days 2 to 4
Continue Monitoring Radiation Levels:
Radiation levels decrease significantly within the first few days; however, it is still advisable to remain sheltered until authorities declare it safe to leave68.
Prepare for Possible Evacuation:
Be ready to evacuate if instructed by officials. Keep emergency supplies handy, including food, water, and medical supplies46.
Follow Official Guidance:
Adhere to any evacuation orders or safety protocols provided by emergency services. They will assess the situation and provide updates on when it is safe to come out of shelter56.
By following these guidelines, you can enhance your chances of safety and survival in the critical days following a nuclear detonation.
Posted: Sat 07 Dec, 2024 3:25 pm
