All B.S. A nuke won't result in a tsunami on the West Coast. Not that type of fault. The San Andreas fault slips north and south, no tsunami will result at all. And a nuke probably won't trigger an earthquake, as the fault is deep underground beyond reach of a nuke. And if an earthquake happened, it would be localized in a small area and not the entire length of the fault.
I find the possibility of triggering the San Andres fault by a nuclear bomb doubtful, as well. If it can be done, the Russians are the ones for the job however, since they've built and tested the world's largest nuclear bomb. Designed capability of 100 megatons, the lead scientist supposedly dialed it back to half that out of concerns a massive amount of radioactive fallout would be released.
I would think triggering a volcano a more likely possibility.