It's funny as I thought I had both of the cats personalities pegged. Bizkit was always 'Psycho Kitty' aka 'Scatty Cat'... jumpy & grumpy, would flee at the slightest thing. Hercules was the beach bum, stoner dude, totally chilled out, just hanging around for the next wave...of food!
What he hasn't hung around for is each aftershock. Over the last weeks he's made himself scarce at the slightest tremor, much to my distress, often disappearing for days.
I think he may finally be relaxing. Either that or he has found a good crop (of catnip) somewhere.