Aftershocks still rattle east Japan four years after megaquake

Living in south Iwate, I guess I've become used to them at this point. Sort of like living next to the railroad tracks. After awhile, you don't notice when the train rumbles by. My kids sleep right through them anymore. Still, I try to be aware of emergency exits wherever I am, keep my gas tank full, cycle fresh cans through my food stockpile, etc... Other lessons I learned from the big one - solar cellphone recharger, spare laptop battery kept fully juiced, and a month's worth of TP.

What about other natural disasters? Didn't Japanese volcanologists recently mention a possible erruption of Mt. Fuji? That could be equally disasterous as any aftershock triggering major fault lines in the sea.