How much force needed to blow open a planet?

I recently asked this question about what would happen if a fusion bomb went off in the core of a planet, and the answer was relatively uninteresting. As was aptly said in my previous answer, the effect of a nuclear bomb in the core would be very small.

So I have a new question (suggested by Tim B.), which is hopefully a little more interesting. How much force would be required in the inner core to blow open a planet? And by blow "open" I mean create a deep chasm down to the magma, but not necessarily blowing the planet apart. In other words, how can I fracture a planet with energy coming from the core? I am aware that such a chasm would probably become a volcano.

And one of my usual bonus questions: Could this happen without blowing the planet apart?

posted about 10 years ago

DonyorM‭

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