Robert W. Clayton

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in the North Atlantic Ocean BY SHARON KEDAR*, MICHAEL LONGUET-HIGGINS, FRANK WEBB, NICHOLAS GRAHAM, ROBERT CLAYTON AND CATHLEEN JONES Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA Institute for Nonlinear Science, University of California, San Diego, La Jolla, CA 92093-0402, USA Hydrologic Research Center, San Diego,(More)
P wave teleseismic travel time delays recorded by the Southern California Array an: inverted by the method of backprojection tamognt.phy to oblain images of variations in the P wave velocity structure: t'? a depth of 750 km. Two major upper mande features are resolved: one beneath the Transverse R~ges region and another beneath the Salton Trough region. The(More)
We determined the variations in seismic structure beneath southern California by using a tomographic method of inversion on teleseismic P delays recorded with the Southern California Array. The algorithm employed was a modified form of an Algebraic Reconstruction Technique (ART) used in medical X-ray imaging. Deconvolution with an empirically estimated(More)
[1] Lateral variations of the crustal structure in southern California are determined from receiver function (RF) studies using data from the Southern California Seismic Network broadband stations and Los Angeles Regional Seismic Experiment surveys. The results include crustal thickness estimates at the stations themselves, and where possible, cross(More)
Density and bulk modulus variations in an acoustic earth are separately recoverable from standard reflection surveys by utilizing the amplitude-versus-offset information present in the observed wave fields. Both earth structure and a variable background velocity can be accounted for by combining the Born and WKBJ approximations, in a "before stack"(More)
Analysis of global traveltime data has been formulated in terms of the stochastic properties of the Earth's heterogeneity pattern and random errors in the data. The formalism relates the coherency of traveltime residuals within bundles of rays (summary rays) of varying size to the spherical harmonic power spectrum of the slowness field of the medium. It has(More)
The California Institute ofTechnology (Caltech), the United States Geological Survey (USGS), and the California Department of Conservation, Division of Mines and Geology (CDMG) are completing the implementation of TriNet, a modern seismic information system for southern California. TriNet consists of two elements, the Caltech-USGS element and the CDMG(More)
[1] Desert booming can be heard after a natural slumping event or during a sand avalanche generated by humans sliding down the slip face of a large dune. The sound is remarkable because it is composed of one dominant audible frequency (70 to 105 Hz) plus several higher harmonics. This study challenges earlier reports that the dunes’ frequency is a function(More)
[1] The last decade featured an explosive sequence of discoveries of slow slip events (SSE) and nonvolcanic tremor (NVT) in different subduction zones and continental faults. Many observations show that SSE is usually associated with an increased NVT activity but it is not clear yet if those events are the result of the same process or are independent(More)