They cause the ocean to briefly drain away from the shore.
They can travel as fast as 500 miles per hour.
They are measured by how far they travel.
Answers
Answer 1
Answer:
They occur a day or two after an earthquake.
Explanation:
Answer 2
Tsunamis are sometimes generated after earthquakes, but they are not necessarily the result of earthquakes. Also,tsunamis can often reach speeds of 200 to 1,000 kilometers per hour,which means it is possible to travel as fast as 500 miles per hour. So I think maybe A and C are both right