Got a very nice reference from my source in the Swedish military. Its nothing new, that most of the fallout radiation is gone after 48h is well known but its nice to see original work by scientests that confirm this.
So, if you are say 10 miles from ground zero, will the decay be even faster then in the diagram I showed?What I found in my research that it depends on the type and proximity you are to the detonation as some of the heavier particles fall closest to ground zero and also tend to have longer half lives.
Radioactive Fallout From Nuclear Weapons Testing | US EPA
So, if you are say 10 miles from ground zero, will the decay be even faster then in the diagram I showed?
But say plutonium has a very long half-life compared to cesium, so plutonium vill decay slower, cesium faster? The radioactivity closer to ground zero should be more constant over time?
In theory.
Keep in mind though that there are some weapons that if used, we really could not calculate the effects.
The Russians developed one dubbed Tsar Bomba. (3,800 x stronger than the ones detonated in Japan WWII)
A single 58 megaton Tsar Bomba (Hydrogen) could cause devastation across 50 miles area, kill millions of people, send a shockwave that would circle the globe three times, and cause a mushroom cloud visible for 500 miles.
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The explosion of Tsar Bomba, according to the classification of nuclear explosions, was an ultra-high-power low-air nuclear explosion.
The mushroom cloud of Tsar Bomba seen from a distance of 161 km (100 mi). The crown of the cloud is 65 km (40 mi) high at the time of the picture. (source: Rosatom State Corporation Communications Department 20-08-2020)
All buildings in the village of Severny, both wooden and brick, located 55 km (34 mi) from ground zero within the Sukhoy Nos test range, were destroyed. In districts hundreds of kilometres from ground zero, wooden houses were destroyed, stone ones lost their roofs, windows, and doors, and radio communications were interrupted for almost one hour. One participant in the test saw a bright flash through dark goggles and felt the effects of a thermal pulse even at a distance of 270 km (170 mi). The heat from the explosion could have caused third-degree burns 100 km (62 mi) away from ground zero. A shock wave was observed in the air at Dikson settlement 700 km (430 mi) away; windowpanes were partially broken for distances up to 900 kilometres (560 mi).[54] Atmospheric focusing caused blast damage at even greater distances, breaking windows in Norway and Finland.[55] Despite being detonated 4.2 km (3 mi) above ground, its seismic body wave magnitude was estimated at 5.0–5.25.
- The flare was visible at a distance of more than 1,000 km (620 mi).[49] It was observed in Norway, Greenland and Alaska.[16]
- The explosion's nuclear mushroom rose to a height of 67 km (42 mi).[14] The shape of the "hat" was two-tiered; the diameter of the upper tier was estimated at 95 km (59 mi), the lower tier at 70 km (43 mi). The cloud was observed 800 km (500 mi) from the explosion site.[16]
- The blast wave circled the globe three times,[16] with the first one taking 36 hours and 27 minutes.[50]
- A seismic wave in the earth's crust, generated by the shock wave of the explosion, circled the globe three times.[49]
- The atmospheric pressure wave resulting from the explosion was recorded three times in New Zealand: the station in Wellington recorded an increase in pressure at 21:57, on October 30, coming from the north-west, at 07:17 on October 31, from the southeast, and at 09:16, on November 1, from the northwest (all GMT time), with amplitudes of 0.6 mbar (0.60 hPa), 0.4 mbar (0.40 hPa), and 0.2 mbar (0.20 hPa). Respectively, the average wave speed is estimated at 303 m/s (990 ft/s), or 9.9 degrees of the great circle per hour.[51]
- Glass shattered in windows 780 km (480 mi) from the explosion in a village on Dikson Island.[16]
- The sound wave generated by the explosion reached Dikson Island, but there are no reports of destruction or damage to structures even in the urban-type settlement of Amderma, which is much closer (280 km (170 mi)) to the landfall.[52]
- Ionization of the atmosphere caused interference to radio communications even hundreds of kilometers from the test site for about 40 minutes.[53]
- Radioactive contamination of the experimental field with a radius of 2–3 km (1.2–1.9 mi) in the epicenter area was no more than 1 milliroentgen / hour. The testers appeared at the explosion site 2 hours later; radioactive contamination posed practically no danger to the test participants.[16]
IF this bomb had used plutonium the yield would have been at 100mt instead of 50. It only took 16 weeks to design and construct...and that was many decades ago.
What it comes down to is that there is only so much you can do to protect yourself from these things.
Too many unknowns to cover all possibilities and scenarios unless you have unlimited resources and funding.
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this giant bomb is not what they have today?
Here is a 10Mton blast near my hometown. I am 25km away and I would make it I stay inside, betterr still in my basement. The fallout depends if its a ground or air-blast and also wind-direction. I am near Laxå. So even this very large bomb is not the end for me. Karlskoga is a tactical targets because if arms-industri there.
View attachment 16000
The Tsar bomba was not dropped from a plane. It was too big to fit on any plane of that day. It was for show only. The Soviet Union used it for propaganda. They are good at that. It is their favorite weapon. Russia carries on the tradition.
We dont know offcourse what will happen. I think Karlskoga is the closest target for nukes for me, and its really close. Thats my scenario. Its more likely that Russia uses a 100kton load, thats what Swedish military usually uses as example. 10Mton is crasy big for a small town even with arms indutry. If Putin uses 50Mton I will meet my maker before I even see the light from the bomb.BUT....you are assuming only one bomb...what if Karlstad, Orebro and then any areas with military bases were also hit? Areas that manufacture things could also be on a target list. We just do not KNOW, we can put forth an educated guess at best. How will wind patterns be disrupted in the upper atmosphere with multiple detonations?
I am not saying stop trying to protect yourself as best you can and throw your hands up and resolve to die, only trying to point out that we cannot know every eventuality and prepare for it.
Todays technology with plutonium etc, makes the charge smaller, no problem to make a missile. We have the Satan 2 missile, it can whipe out France…It looks like a plane dropped it, but maybe Wikipedia got it wrong?
Tested on 30 October 1961, the scientific result of the test was the experimental verification of calculation principles and multi-stage thermonuclear charges. The bomb was dropped by parachute from a Tu-95V aircraft, and detonated autonomously 4,000 metres (13,000 ft) above the Sukhoy Nos ("Dry Nose") cape of Severny Island, Novaya Zemlya, 15 km (9.3 mi) from Mityushikha Bay, north of Matochkin Strait.[8][9][10]
I'm sure the Tsar Bomba would be WAY too heavy for an ICBM and I'd be more concerned about ICBMs (especially from subs) than I would be from planes dropping bombs!
Top 10 Intercontinental Ballistic Missiles | Military-Today.com
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