### Question
How is the term lahar defined?


### Answer
The term **lahar** is defined in *43 U.S.C. § 3101* as the following:

> a large debris flow of mostly volcanic material that is—


(A) often fast-moving

#### Citation:
  - *43 U.S.C. § 3101*
  - Heading: **CHAPTER 49-NATIONAL LANDSLIDE PREPAREDNESS**

