Skip to main content
U.S. flag

An official website of the United States government

Field crews use a radar gun, similar to that used by law enforcement officers, t

By Volcano Hazards Program
image related to volcanoes. See description
Original Thumbnail Medium

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.