By now, you may have seen the pictures of the tsunami that crashed into Japan’s northeast coast after the earthquake on Friday. Thirty-foot waves came ashore. They leveled buildings, and carried ships and cars into nearby rice fields. The waves came as far as three miles inland. Harry Yeh was watching closely. In fact, he was watching Japanese television in his Oregon home early Friday morning when the earthquake and resulting tsunami waves hit. He’s a Professor of Coastal and Ocean Engineering at Oregon State University.