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Seismology. - GeoWeb

HookeHooke s Law (or )1760 MitchellRecognitionthatgroundmotiondueto earthquakesis relatedtowave propagation1821 NavierEquationofmotion1828 PoissonWave equation P&S-waves1885 RayleighTheoreticalaccountsurfacewaves Rayleigh&Love waves1892 MilneFirsthigh-qualityseismograph beginofobservationalperiod1897 WiechertPredictionofexistenceofdensecore (basedonmeteorites Fe-alloy)1900 OldhamCorrectidentificationofP,Sandsurfa cewaves1906 OldhamDemonstrationofexistenceofcorefrom seismicdata1906 GalitzinFirstfeed-backbroadbandseismogra ph1909 Mohorovi ci cCrust-mantleboundary1911 LoveLove waves(surfacewaves)1912 GutenbergDepthtocore-mantleboundary:2900 km1922 Turnerlocationofdeepearthquakesdownto600 km(butlocatedsomeat 2000km, )1928 WadatiAccuratelocationofdeepearthquakes Wadatai-Benioff

Chapter 4 Seismology. 4.1 Historical perspective. 1678 – Hooke Hooke’s Law (or ) 1760 – Mitchell Recognition that ground motion due to earthquakes is related to wave propagation

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