most of them you haven't heard about because they happened in places like us a beck stan or the canariry islanded but they're happening every day. every day the planet is experiencing thousands of earthquakes, and the thing is we don't know when and we don't know where. according to the usgs there are 2100 known faults in the united states, and for each one of those known faults, we think there are anywhere between 10, 100, maybe even a thousand, faults we have not discovered yet. and when you think about the last 200 years, in the united states, every single earthquake that has occurred, every single major earthquake, occurred on a fault we didn't know about prior to that earthquake. we know about fat zones, places like the san andreas fat -- fault zone. most of the faults we do know about are west of the mississippi and that's not necessarily because west of the mississippi is more sort of seismically predisposed. it's because we have done more research there. when you talk to usgs geologists and seismologists, they say if you want to be really terrified, think about earthquake potenti