The 9.0 Earthquake at 6.58 hours at the epicenter (and in Sri Lanka) led to a sequence of 15 other quakes ...While earthquakes could not be predicted in advance, once the earthquake was detected it would have been possible to give about 3 hours of notice of a potential Tsunami. Tsunamis are rarer in the Indian Ocean as the seismic activity is much less than in the Pacific.Earthquakes occur when any of the 12 or 13 plate collide at their boundaries. The present collision is due to compression between the Indian and Burmese plates. Scientists believe that one plate that comprised the landmass from India to Australia has broken into two. more. . . .