Curious? Do you remember the tsunami in indonesia (southern hemisphere) and the effects monitored around the world. If I recall, the earth actually changed shape, albeit slightly and for a short time.
I never did hear if it had an effect on plate tectonics. Lots of questions, few answers.
The Indian theory is true....the dinosaurs all died out when they tried to get customer support from Dell.....
Earthquakes by definition have an impact on plate techtonics.