Mohorovičić discontinuity
Immediately above the Moho, the velocities of primary seismic waves (P-waves) are consistent with those through basalt (6.7–7.2 km/s), and below they are similar to those through peridotite or dunite (7.6–8.6 km/s).Using velocity data from the earthquake, he was able to calculate the depth of the Moho to be approximately 54 km, which was supported by subsequent seismological studies.[14] After initial success in establishing deep-ocean drilling, the project suffered from political and scientific opposition, mismanagement, and cost overruns, and it was cancelled in 1966.[16] One proposal considers a rock-melting radionuclide-powered capsule with a heavy tungsten needle that can propel itself down to the Moho discontinuity and explore Earth's interior near it and in the upper mantle.Plans called for the drill-ship JOIDES Resolution to sail from Colombo in Sri Lanka in late 2015 and to head for the Atlantis Bank, a promising location in the southwestern Indian Ocean on the Southwest Indian Ridge, to attempt to drill an initial bore hole to a depth of approximately 1.5 kilometres.
mantleseismic waveslithospheremid-ocean ridgesasthenosphereocean flooraverageCroatianseismologistAndrija Mohorovičićoceanic crustcontinental crustseismogramsshallow-focusearthquakesP-wavesS-wavesrefractedOrdovicianophioliteGros Morne National ParkNewfoundlandvelocitiesbasaltperidotiteduniteophiolitesXenolithscratonsbasalticintrusionsSerpentinizationZagrebgeologyseismologyProject Moholecost overrunsSovietKola Superdeep Boreholeradionuclide-poweredtungstenEarth's interiorChikyu HakkenChikyūIntegrated Ocean Drilling Programdrill-shipJOIDES ResolutionColomboSri LankaIndian OceanSouthwest Indian RidgeBrittle–ductile transition zoneCore–mantle boundaryLehmann discontinuityGutenberg discontinuityMannheimDudenverlagBibcodeThomas Nelson & SonsRichard Brook CathcartSchlumbergerDixon, DougalImaginovaNational Academy of SciencesPhysical oceanographyAiry wave theoryBallantine scaleBenjamin–Feir instabilityBoussinesq approximationBreaking waveClapotisCnoidal waveCross seaDispersionEdge waveEquatorial wavesGravity waveGreen's lawInfragravity waveInternal waveIribarren numberKelvin waveKinematic waveLongshore driftLuke's variational principleMild-slope equationRadiation stressRogue waveDraupner waveRossby waveRossby-gravity wavesSea stateSeicheSignificant wave heightSolitonStokes driftStokes problemStokes waveTrochoidal waveTsunamimegatsunamiUndertowUrsell numberWave actionWave baseWave heightWave nonlinearityWave powerWave radarWave setupWave shoalingWave turbulenceWave–current interactionWaves and shallow waterone-dimensional Saint-Venant equationsshallow water equationsWind fetchWind setupWind waveCirculationAtmospheric circulationBaroclinityBoundary currentCoriolis forceCoriolis–Stokes forceCraik–Leibovich vortex force