E. Friis-Christensen

Eigil Friis-Christensen was a Danish geophysicist specializing in space physics and geomagnetism. He was born on 29 October 1944 and died on 21 September 2018; his work made major contributions to understanding Earth's magnetic field from space and to solar-terrestrial physics.

Oct 29, 1944 Wikipedia
geophysics space physics geomagnetism