Inge Lehmann

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Inge Lehmann
Inge Lehmann 1932.jpg
Latest company Geodetic Institute
BSc physical science, mathematics
BSc university University of Copenhagen, University of Cambridge

Inge Lehmann (May 13, 1888 – February 21, 1993) was a Danish seismologist and geophysicist. In 1936, she discovered that the Earth has a solid inner core inside a molten outer core. Before that, scientists believed Earth's core to be a single molten sphere. However, seismologists had been unable to explain careful measurements of seismic waves from earthquakes, which were inconsistent with the Earth having a single molten core. Lehmann analysed the seismic wave measurements, and she concluded that Earth must have a solid inner inside a molten outer core to produce seismic waves that matched the measurements. Other seismologists tested and then accepted Lehmann's explanation. [1][2][3]


  1. "Lehmann, Inge". Complete Dictionary of Scientific Biography. Detroit, MI: Charles Scribner's Sons. 2008. Retrieved 15 October 2013.
  2. "Lehmann; Inge (1888–1993)". The Royal Society: Past Fellows. Retrieved 24 September 2013.
  3. Bolt, Bruce A. (January 1994). "Inge Lehmann". Physics Today 47 (1): 61. doi:10.1063/1.2808386.

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