Photographs were taken by using custom-built digitization device DigiMAG. Method publication Kärhä, O., & Tanskanen, E. I. (2022). Newly digitized data from Scandinavian Magnetometer Array network shows large regional differences in magnetic environment. Journal of Geophysical Research: Space Physics, 127, e2022JA030311. https://doi.org/10.1029/2022JA030311 describes how to use the data. The magnetograms have been recorded during the following time periods: Andenes (AND) 01.12.1977 - 14.02.1978 Arvika (ARV) 10.12.1977 - 03.05.1978 Berlevag (BER) 05.11.1977 - 19.01.1978 Evenes (EVE) 01.12.1977 - 14.02.1978 Fredvang (FRE) 30.11.1977 - 14.02.1978 Glomfjord (GLO) 29.11.1977 - 17.12.1977 Hassela (HAS) 07.12.1977 - 23.02.1978 Hellvik (HEL) 22.11.1977 - 16.04.1978 Jokikylä (JOK) 28.10.1977 - 08.01.1978 Kiruna (KIR) 02.11.1977 - 12.01.1978 Klim (KLI) 20.11.1977 - 15.04.1978 Kvikkjokk (KVI) 31.10.1977 - 10.01.1978 Lycksele (LYC) 06.12.1977 - 22.02.1978 Malöy (MAL) 25.11.1977 - 23.12.1977 Mattisdalen (MAT) 03.11.1977 - 14.01.1978 Mieron (MIE) 03.11.1977 - 14.01.1978 Mikkelvik (MIK) 03.12.1977 - 16.02.1978 Muonio (MUO) 03.11.1977 - 13.01.1978 Namsos (NAM) 27.11.1977 - 10.02.1978 Nattavaara (NAT) 31.10.1977 - 10.01.1978 Okstindan (OKS) 28.11.1977 - 11.02.1978 Oulu (OUL) 29.10.1977 - 08.01.1978 Pello (PEL) 30.10.1977 - 09.01.1978 Pitea (PIT) 05.12.1977 - 18.02.1978 Ritsemjokk (RIJ) 01.11.1977 - 11.01.1978 Risede (RIS) 27.11.1977 - 09.02.1978 Rostadalen (ROS) 04.12.1977 - 17.02.1978 Sauvamäki (SAU) 28.10.1977 - 07.01.1978 Skogfoss (SKO) 06.11.1977 - 18.01.1978 Söröya (SOR) 04.11.1977 - 15.01.1978 Storavan (SRV) 06.12.1977 - 19.02.1978 Vadsö (VAD) 06.11.1977 - 20.01.1978

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