National Weather Service United States Department of Commerce

Tsunami Energy/Propagation Time, February 27, 2010

The colors on this map show the maximum tsunami forecast heights in the deep ocean and the general direction of the tsunami's energy. The gray lines show the lead tsunami wave's expected travel time as it moves across the ocean basin. This tsunami was generated by a magnitude 8.8 earthquake. For comparison, view the map from the 1960 Chile tsunami,which was generated by the strongest earthquake in recorded history. Note that the forecast heights for the two events are different, but the travel time is the same.