We could probably build a bomb large enough to put a really major dent in the moon,if not perhaps disintegrate it.
I’m unclear why anybody would want to, though.
We likely couldn’t do any real damage, at that point on time.
Those moon craters were created by meteorites that hit it with more force than anything we can create at the time of this report and the moon is still their.
I believe we could actually split the moon and suffer no real I’ll effects, because the gravity forces would re-meld the moon.
The moon has 1.2% the mass of the earth, per Google calculator. That would be like talking of a bomb that could disintegrate a conical wedge of the earth that encompassed the continental USA... I don’t think so, not the biggest thermonuclear device ever constructed on earth.
Please...
The entire nuclear arsenal of the planet at the heighth of the cold war (~50,000 Mt) fabricated into one bomb would hardly make a noteworthy new crater on the moon aside from the fact that the surface in the blast area would be vitrified and reflect some more light.
Major extinction events here have been in association with energy releases on the line of 200,000,000 Mt, and while it screwed the earth up, it came no where near destoying it, or all life on it for that matter (which would actually probably take reliquifying the lithospere to a depth greater than 1 mile).