Venerable, geomagnetic Observatories
When geomagnetic measurements have been going on for almost a century in the same location, all sorts of historic treasures can be …
Early Space Weather
I wasn’t entirely sure about what to write about today, so I decided to post a picture: During the 1st International Polar …
An Alarm Bell for Aurora
The World’s first auroral observatory was built by Kristian Birkeland in 1899 on the mountain Haldde just west of Alta in Northern …