Refraction
![Illustration showing an angled downward vector in two scenarios: The first shows a vector going through Rock Type 1 and then getting a less steep slope in Rock Type 2, meaning the velocity in rock type 2 is greater than velocity in rock type 1; and the second shows a vector going through Rock Type 1 and then getting a more steep slope in Rock Type 2, meaning the velocity in rock type 2 is less than velocity in rock type 1](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/refraction%20.gif?itok=TutUGvD7)
Detailed Description
Refraction is (1) the deflection, or bending, of the ray path of a seismic wave caused by its passage from one material to another having different elastic properties. (2) bending of a tsunami wave front owing to variations in the water depth along a coastline.
Sources/Usage
Image courtesy Charles Ammon, Penn State