http://news.yahoo.com/s/ap/as_japan_earthquake
"It swept inland about six miles (10 kilometers) in some areas, swallowing boats, homes, cars, trees and everything else."
"The tsunami was unbelievably fast," said Koichi Takairin, a 34-year-old truck driver who was inside his sturdy four-ton rig when the wave hit the port town of Sendai."
Another article said that the tsunami was moving at about 500 mph, the speed of a jetliner.
Compared to what's coming, this was a relatively small tsunami. If you are on or near a coastline, you need to evacuate NOW!