I took my sons to Pacific Rim yesterday, and this thought came to mind afterward:

What if a kaiju really did emerge from the ocean, today, in this real world, with our real tech and social/political/military situations?

For those of you who haven't seen the movie, just assume Godzilla, or the Cloverfield monster. They're all basically the same concepts.

A giant beast (~300 feet / ~100 meters tall) rises from the depths of the Pacific ocean -- say, the Mariana Trench -- and heads towards land -- say, Japan. How soon would it's presence be known? What would/could we do? How would the world react? How could it be defeated? How far would it get, how much damage would it wreak before being defeated? Its only motivation is destruction, (although we couldn't know that, at least in the beginning).

Assuming it gets defeated, how would our world change/react to the idea that such a threat exists/ed? Using modern tech, or tech that could be reasonably assumed to be quickly developed based on our current scientific knowledge, how could we determine if there are other kaiju in the depths.

And finally: if it were possible for such a creature to even exist, to move its own body weight, etc., would it be impervious to our current military tech? That is, if a creature could grow and live and wreak destruction at that size, (and come from 6+ miles below the ocean surface), would its body be too thick and tough for bunker busters and nuclear explosions?

Bullgrit

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