You will be given a definition of a task first, then some input of the task.
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 sharp jolts. Surface waves are responsible for rolling motions that do most of the damage in an earthquake. Answer: seismic waves
Output:
Body waves and surface waves are the two major types of what, which occur during earthquakes?