was a Japanese physicist specializing in the near-Earth space environment. He served as Secretary General of the
International Association of Geomagnetism and Aeronomy
The International Association of Geomagnetism and Aeronomy (IAGA) is an international scientific association that focuses on the study of terrestrial and planetary magnetism and space physics.
IAGA is one of the eight associations of the Interna ...
from 1975 to 1983. In 1990 he was awarded the
AGU's
Waldo E. Smith Medal.
He is best known for proving that, under certain conditions, the magnetic field from a
field-aligned current and the magnetic field from the associated
Pederson current in the
ionosphere would exactly cancel at the surface of the Earth. The magnetic equivalence of field-aligned currents with Pederson currents is referred to colloquially as
Fukushima's Theorem.
20th-century Japanese scientists
20th-century Japanese astronomers
1925 births
2003 deaths
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