Installing geophysical boreholes in Yellowstone
By Yellowstone Volcano Observatory
2008 (approx.)
![Installing geophysical boreholes in Yellowstone](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/drilling_horiz.jpg?itok=qwtORU3s)
Detailed Description
UNAVCO engineers drilling a borehole for instrument installation (left). Aerial view of borehole casing used to protect instruments from the elements found below the surface (right).
Sources/Usage
Public Domain.