might be, when it will happen, and we don t know how long the eruptive sequence of events is going to take. so there s a lot of unknowns here, and what i will say is, while we didn t know that this eruption was going to occur on this scale, as far as the tsunami goes, we have sensors throughout the oceans, buoys that record when the ocean fluctuates. and those sensors are so delicate that they can tell even the matter of just a few inches of water displacement. so as soon as this eruption happened and the shock waves started to go out in the air, the ocean water was displaced as well. so folks on the coastal regions of japan, north america, south america, australia, new zealand, they all had warnings that tsunami waves could reach them. fortunately people were warned on those areas. but the island of tonga, much closer to the eruption, seems