Magnetic Activity Plots
![Two plots of wiggly lines](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/intro-geomag.figures.f7.jpg?itok=6nzOC4e3)
Detailed Description
Figure 7. Magnetic activity is driven by the Sun. (a) The monthly standard deviation in the horizontal intensity H as measured at German observatories. (b) Monthly averages for sunspot number.
Sources/Usage
Public Domain.