Good luck.
Do some reading. It’s a good “thought” exercise for your prepping. No kidding—such an extreme tectonic event changes almost all of the assumptions.
For example, you have plenty of ammo. That’s great. What will you hunt—because the animals will ALL be dead. Sure you will shoot raiders, but they will be dead in a. Couple of weeks. See what I mean? It is a fun exercise to do the what if....what if....what if.
Humans have survived these things. Just not many of them.
But the government will take care of us, right?
(said Mr Hey I Missed April Fools Day but what the heck)