I wonder if x is correlated with y. Here are some citations on z and y. If that's what you mean, sure. You win. Here's some more data: http://earthquake.usgs.

I wonder if x is correlated with y. Here are some citations on z and y. If that's what you mean, sure. You win. Here's some more data: http://earthquake.usgs.gov/earthquakes/states/historical_state.php#california http://earthquake.usgs.gov/earthquakes/states/historical_sta... _____________ edit: Big quakes are at once relatively rare and over time quite common. The last one happened under the ocean... 0.652°N, 124.692°W 18.2 miles below the surface. in 2010