Field crews use a radar gun, similar to that used by law enforcement officers, t
![image related to volcanoes. See description](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/img6682.jpg?itok=T-Xawh8V)
Detailed Description
Field crews use a radar gun, similar to that used by law enforcement officers, to get an approximation of the speed of lava as it exits the fissure 8 cinder cone. At the time these measurements were taken, the speed averaged 18 miles per hour.
Sources/Usage
Public Domain.