Inge Lehmann (May 13, 1888 - February 21, 1993), Fellow of the Royal Society (London) 1969, was a Danishseismologist who, in 1936, argued that the Earth must not only have a molten interior, but a solid core at the center, which deflects P waves. She also wrote a book called P, which dealt with P waves and other aspects of seismography. She was awarded the Tagea Brandt Rejselegat twice, in 1938 and 1967. May 13 is the 133rd day of the year in the Gregorian Calendar (134th in leap years). ... 1888 is a leap year starting on Sunday (click on link for calendar). ... February 21 is the 52nd day of the year in the Gregorian Calendar. ... 1993 is a common year starting on Friday of the Gregorian calendar and marked the Beginning of the International Decade to Combat Racism and Racial Discrimination (1993-2003). ... The Royal Society of London for the Improvement of Natural Knowledge, known simply as the Royal Society, is claimed to be the oldest learned society still in existence. ... Seismology (from the Greek seismos = earthquake and logos = word) is the scientific study of earthquakes and the movement of waves through the Earth. ... 1936 was a leap year starting on Wednesday (link will take you to calendar). ... A seismic wave is a wave that travels through the Earth, often as the result of an earthquake or explosion. ... The Tagea Brandt Rejselegat (Travel Award) is awarded annually to distinguished Danish female academics, artists and writers. ... 1938 was a common year starting on Saturday (link will take you to calendar). ... 1967 was a common year starting on Sunday of the Gregorian calendar. ...
See also: Richard Dixon Oldham Richard Dixon Oldham (July 31, 1858 – July 15, 1936) was a British geologist who, in 1906, argued that the Earth must have a molten interior as S waves were not able to travel through liquids nor through the Earths interior. ...
Throughout her long career, which extended far beyond her official retirement in 1953, Lehmann conducted research in Europe and North America and was active in international scientific organizations including serving as the first president and a founder of the European Seismological Federation.
Lehmann was one of two daughters born to Alfred Georg Ludvig Lehmann, a University of Copenhagen professor of psychology, and Ida Sophie Torsleff.
Lehmann continued her research well after her retirement in 1953, exploring the nature of the planet's interior in Denmark, in Canada at the Dominion Observatory in Ottawa and in the United States at the University of California at Berkeley, the California Institute of Technology, and the Lamont Doherty Earth Observatory at Columbia University.
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