Who is Inge Lehmann, and why has Google created a doodle for her?
Without the Danish seismologist and geophysicist, people wouldn’t know that they live in a world composed of an inner and outer core. May 13, 2015 marks the scientist’s 127th birthday.
Born in 1888, Lehmann discovered the earth’s inner core by using primary waves, which are seismic waves with high velocities. It was in 1929 when she set off to study an earthquake that occurred near New Zealand. Beneath the area, she found that primary waves were bouncing off, causing higher frequency of seismic actions.
Her study resulted to the “Lehmann Discontinuity.”
Due to her discovery, the American Geophysical Union established what is now the Inge Lehmann Medal that seeks to recognize “outstanding contributions to the understanding of the structure, composition, and dynamics of the Earth’s mantle and core.”