Inside, in the most inside part of wherever you can get to within 10 minutes of the blast (before the fallout starts snowing down). If you stay sheltered, you can survive. Try to minimize airflow. Try to stay inside for 2 weeks. The first hours are by far the worst.
If you're outside 10 minutes after the blast, and it starts snowing, you've probably already gotten a fatal dose and will likely die a painful death from acute radiation syndrome within the next two weeks.
What kind of structure can you avoid the initial flash and heat wave (if not the concussive / overpressure blast wave)?
Concrete? Brick? Can you just get behind a 6 inch concrete wall and you are OK from the flash and heat wave? What if you dive under the water (in a pool or whatnot)?
Heavily-reinforced concrete and/or underground. The more rebar, the better.
Jumping in a pool won't help much if you're in the big part of a pressure wave, I'd guess, since the water would probably all be removed.
Anywhere near a 20 psi overpressure thermonuclear blast near the target is going to be rough. Survivors will likely be on the outskirts of wherever it hits, being honest.
The amount more powerful a modern big fusion bomb is than what we dropped on Japan in 1945 boggles the mind. It's almost impossible to conceive of how bad they are.
Like, if a huge one was dropped on San Fran, about a million people would be dead immediately, plus some unknown potentially large number more due to fallout.
Yeah new bombs are crazy. No loss of cool if you're not--you're a nuke physicist, that's cool enough--but are you The Nukemap guy? Wow! That site is great, but scary.
No I'm not Alex wellerstein the nuclear history professor. He has like 44k followers on Twitter and a blue tick. I only have like 10k and no blue tick ;'(
If you're outside 10 minutes after the blast, and it starts snowing, you've probably already gotten a fatal dose and will likely die a painful death from acute radiation syndrome within the next two weeks.
JUST GO INSIDE