Erich Rieger

Erich Rieger
Born1 October 1935
Gauting, Germany
Died14 August 2021 (aged 85)
CitizenshipGermany
Alma materPh.D. (Technical University of Munich)
Known forRieger periodicities
Scientific career
FieldsAstrophysics, Heliophysics, Geophysics
InstitutionsMax Planck Institute for Extraterrestrial Physics
(Garching, Germany)
ThesisInterpretation of the sintering processes in thorium powder compacts (1962)

Erich Rieger (1 October 1935 – 14 August 2021) was a German astrophysicist who spent his research career at the Max Planck Institute for Extraterrestrial Physics (MPE) near Munich. He is notable for his 1984 discovery of the period of ~154 days in solar flares. Since the discovery, the period has been confirmed in most heliophysics data in the Solar System, including the interplanetary magnetic field, and has become known as the Rieger period (PR). Rieger died on 14 August 2021, at the age of 85.