Water bomb

Water bomb

Water bomb

Bad Astronomy
The entire universe in blog form
Sept. 26 2012 10:30 AM

Water bomb

Via Jenny Winder, I saw this video showing footage from underwater nuclear bomb tests in 1958. It's astonishing.

Phil Plait Phil Plait

Phil Plait writes Slate’s Bad Astronomy blog and is an astronomer, public speaker, science evangelizer, and author of Death From the Skies!  

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The awesome power and energy released is difficult to wrap your head around. Think on this: a cubic meter of water weighs a ton. Now imagine taking a single cubic meter of water and lifting it, say, 100 meters in the air, accelerating it to several hundred kilometers per hour.

Now look again at that plume. How many cubic meters of water were are in it? Even being conservative I'd say it was in the millions, meaning millions of tons of water blasted upward and outward by the force of the explosion. It's terrifying. And mind you, the test shown was for a relatively small blast: about an 8 or 9 kiloton yield (the equivalent of 8-9 thousand tons of TNT), whereas big nukes are capable of 20 megatons, over a thousand times the explosive yield shown.

I'm fascinated by big bangs - from the first one, to supernovae, and all the way down to bombs we humans make in our clever and plodding attempts to kill one another. Every now and again it's good to get a solid reminder of just what these explosions are capable of.

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