Given the task definition and input, reply with output. Given a scientific passage and an answer, generate a question for the given answer.

Passage: There are two major types of seismic waves. Body waves travel through the Earth's interior. Surface waves travel along the ground surface. In an earthquake, body waves are responsible for the sharp jolts. Surface waves are responsible for the rolling motions that do most of the damage in an earthquake. Answer: surface waves
What are the rolling motions during an earthquake called?