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Andrija_Mohorovicic

Satellite confirms Croatians' big discovery

Croatian Times

Scientists have finally, with the help of using European Space Agency's Goce satellite, managed to capture the boundary between the Earth's crust and the mantle known as Mohorovicic discontinuity, usually referred to as the Moho for short.

Moho discontinuity is named after the Croatian geophysicist Andrija Morovicic and was first identified in 1909 by Mohorovicic, when he observed that seismograms from shallow-focus earthquakes had two sets of P-waves and S-waves, one that followed a direct path near the earth's surface and the other refracted by a high velocity medium.

Goce satellite is suitable for determining the depth of the Moho layer because it is equipped with devices that detect subtle variations in the earth's gravitational field. It will also be able to be used in searching for new sources of oil and gas.

In the late 1950s and early 1960s, some scientists proposed to drill a hole through the bottom of the ocean to the Moho layer. Unfortunately, this effort, called Project Moho, never got enough support because it was very expensive and technically demanding.

"The Moho discontinuity layer exists in the composition of rocks," said Dr Daniel Sampietro from Politecnico di Milano. "The crust is less dense than the mantle. Since the density changes it implies a change in weight, I can use Goce to observe the Moho," explained Sampietro.




Tag cloud Mohorovicic  waves  Sampietro  variations  Goce  Scientists  1960s  1950s  crust  layer  discontinuity  mantle  Croatians  sources  subtle  devices  satellite  Moho  drill  earth



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