This image is not available for purchase in your country.

Richard Oldham, Irish seismologist and geologist

Richard Oldham, Irish seismologist and geologist

H415/0038

Rights Managed

This image is not available for purchase in your country.

Please contact your Account Manager if you have any query.

Credit

SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY

Caption

Richard Oldham. Portrait of Richard Dixon Oldham (1858-1936), the Irish geologist and seismologist who discovered the Earth's core. Oldham spent much of his professional life in India. In 1897 he dis- tinguished between P (primary or pressure) and S (secondary or shear) seismic waves. He also desc- ribed many other characteristics of earthquake activity. In 1906 he discovered that P waves reached points on the opposite side of the Earth from the earthquake epicentre later than expected. He correctly deduced that this was because the Earth had a relatively dense core through which the P waves travelled more slowly than they did through the less dense mantle.

Release details

Model release not available. Property release not required.

 {{ i.shot_duration ? i.shot_duration + ' ' : '' }}{{ i.shot_uhd ? '4K ' : i.hires ? 'HD ' : '' }}{{ i.spl_number }} R{{ i.license }}

  • Add to board
  • Similar {{ mediaType(i) }}