Kärhä, O. & Tanskanen, E. I. (2022) four photographed magnetograms recorded by Scandinavian Magnetometer Array in 1977 and digitized numerical values from the substorm that occurred on October 26-30, 1977

Photographs were taken by using custom-built digitization device DigiMAG. Method publication Kärhä, O. & Tanskanen, E. I. (2022) describes how to use the data. Cite to this publication when you use the data. The magnetograms have been recorded during the following time periods: 19.08.1977 - 02.11.1977 (Kiruna), 20.08.1977 - 01.11.1977 (Ritsemjokk), 22.09.77- 01.12.1977 (Evenes) and 22.09.1977 - 04.12.1977 (Rostadalen).