Wednesday BBC Four 8pm (GMT)
"10 Things You Didn't Know About Earthquakes"
BBC page on upcoming prog then on iPlayer.

Should be interesting in this context.

And thankyou Iains. I am more scared by Global Warming than I ever was. 15cm seasonal sea level rise in Alsaka correlates with biannual predictable seasonal eruptions of one noted volcano. Tides are much higher than that, even though most sea level talk was of a much slower rate of change.
I still adhere to the analogy of friction and particularly stiction cf tidal friction. clue's in the name.