The worst case scenarios are all for the local area and might include the unstable flank of a volcano sluffing off into the sea and creating a bad wave. A rise in the sea floor could create some smaller waves and a relatively shallow quake like this could give rise to something.
All that is the reason for the warning system that Southeast Asia should have been, but wasn't hooked up to. That lack of warning made the Asian Tsunami so deadly.
thank you so much for such a great explanation!
he has just moved there. would you recommend I ask to be on the ping list for this sort of thing?