Olof Palme | Olof Mörck | Olof Skötkonung | Lars-Olof Mattsson | Per Olof Christopher Aurivillius | Olof von Dalin | Olof Rudbeck the Younger | Olof Molander | Ólöf Arnalds | Olof the Brash | Olof Palme International Center | Ólöf Nordal | Olof Krans | Olof Johansson | Olof Hiorter | Olof Gustafsson | Olof Dreijer | Olof Björnsson | Olof Aschberg | Kjell-Olof Feldt |
He rediscovered, using simple magnetic field measurement instruments, that when the aurora appeared the needles of magnetometers changed direction, confirming the findings of Anders Celsius and assistant Olof Hjorter more than a century before.