Geomagnetism Guam
By Geomagnetism Program
2010 (approx.)
![Department of Interior U.S.G.S Guam Magnetic Observatory sign](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Guam_sign_web.jpg?itok=34QKkPIv)
Detailed Description
The Department of Interior U.S.G.S. Guam Magnetic Observatory sign.
Sources/Usage
Public Domain.
The Department of Interior U.S.G.S. Guam Magnetic Observatory sign.
Public Domain.