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International Geophysical Year

18-month collaboration in Earth sciences (1957–1958)

  • 12 min read
  • 9 chapters

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Through Cold War, China and Earth's magnetic field

The IGY encompassed fourteen Earth science disciplines: aurora, airglow, cosmic rays, geomagnetism, gravity, ionospheric physics, longitude and latitude determinations (precision mapping), meteorology, oceanography, nuclear radiation, glaciology, seismology, rockets and satellites, and solar activity. The timing of the IGY was particularly suited for studying some of these phenomena, since it covered the peak of solar cycle 19. One of the most ambitious global programmes of scientific research in the 20th century, it involved over 60,000 scientists from 67 countries assigned to research, alongside the formation of some 48 operational Antarctic bases.

The Soviet Union and the U.S. both launched artificial satellites during the IGY; the Soviet Union's Sputnik 1, launched on October 4, 1957, was the first successful artificial satellite. Other significant achievements of the IGY included the discovery of the Van Allen radiation belts by Explorer 1 and mid-ocean submarine ridges, an important confirmation of plate-tectonic theory. International research bases were established in Antarctica, many of which have been maintained to the present day, including at the south pole. The IGY also spurred early research at Mauna Loa Observatory in Hawaii, established in June, 1956.

History

The origin of the International Geophysical Year can be traced to the International Polar Years held in 1882–1883, then in 1932–1933 (and, most recently from March 2007 to March 2009). On 5 April 1950, multiple scientists (including Lloyd Berkner, Sydney Chapman, S. Fred Singer, and Harry Vestine) met in James Van Allen's living room and suggested that the time was ripe to have a worldwide Geophysical Year instead of a Polar Year, especially considering recent advances in rocketry, radar, and computing. Berkner and Chapman proposed to the International Council of Scientific Unions that an International Geophysical Year (IGY) be planned for 1957–58, coinciding with an approaching period of maximum solar activity. In 1952, the IGY was announced. Joseph Stalin's death in 1953 opened the way for international collaboration with the Soviet Union.

In 1952 the Comité Spécial de l'Année Géophysique Internationale (CSAGI), a special committee of the ICSU, was established to coordinate the International Geophysical Year (IGY) under president Sydney Chapman, a British geophysicist.

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