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Photographer: Andrew Ruppenstein
Taken: September 20, 2018
Caption:
Inge Lehmann Monument and Marker - wider view | Additional Description: Inge Lehmann(13 May 1888 – 21 February 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, seismologists believed Earth's core to be a single molten sphere, being unable, however, to explain careful measurements of seismic waves from earthquakes, which were inconsistent with this idea. Lehmann analysed the seismic wave measurements and concluded that Earth must have a solid inner core and a molten outer core to produce seismic waves that matched the measurements. Other seismologists tested and then accepted Lehmann's explanation. Lehmann was also the longest-lived woman scientist, having lived for over 104 years. -
WikipediaSubmitted: September 28, 2018, by Andrew Ruppenstein of Lamorinda, California.
Database Locator Identification Number: p447286
File Size: 2.324 Megabytes
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