Browsing by Department "Geophysics"

Now showing items 1-11 of 11

    • A Study of Auroral & Polar Magnetic Substorms 
      Porter, Jason G. (1976)
      This study was an attempt to reproduce the field variations observed during a particular polar magnetic substorm by a simple model current system. A line current model consisting of flow down field lines, along auroral ...
    • Crustal Structure Of The Continental Margin Of The Eastern United States 
      Morris, Joe L. Jr (1976)
      Gravity data from the Cape May region of the eastern United States was employed to determine the behavior of the crust-mantle interface in the transition region of the continental margin. By using the Talwani method of ...
    • Experimental Relationships of Clay Gouge to Faulted Rock Properties 
      Hudgins, William T., III (1978)
      Weak clay minerals have been suggested as important members of fault gauge to explain aseismic creep. The Bombolakis silt-clay model seeks to account for aseismic creep and recurrent stress drops along natural faults by ...
    • Induced Polarization Methods 
      Silva, Darrel Allan (1976)
      Investigations of the direct current resistivity theory on which induced polarization theory is partially based, have lead to development of expressions which more clearly indicate the contribution of the perturbing layers. ...
    • The Mean Density of the Oceanic Crust 
      Raskin, Greg Steven (1983)
      There now exist sufficient numbers of recovered marine and ophiolitic samples to correlate their measured velocities and densities with marine seismic survey data in order to determine the mean density of the oceanic crust. ...
    • Microseisms Generated off the Texas Coast 
      Crockett, Dale B. (1980)
      Microseisms that were generated in the Gulf of Mexico were recorded using a seismometer in Hockley, Texas. They were induced by atmospheric disturbances over the Gulf. Their frequency was found using a window length of ...
    • Paleomagnetic Investigation of Leyte and Biliran Island, Central Philippines 
      Ohnstad, Tiffany A. (1986)
      Six sample sites were chosen from over 20 sites located on Biliran and Leyte islands in the central Philippines to determine whether or not rotations associated with either a collision between the Palawan continental terrane ...
    • The Cooling of a Borehole Drilled into an Area with a High Thermal Gradient 
      Dyer, Robert Alan (1979)
      Drilling technology is limited to temperatures less than 350° C. When drilling into magma, temperatures in the 350° - 1100° C range will be encountered, therefore the cooling of the drill bit environment to a temperature ...
    • The Role of Water in Seismic Velocity Ratios as Earthquake Precursors 
      Warren, Christine A. (1977)
      Changes in the ratio of compressional to shear seismic wave velocities prior to an earthquake occurrence. Two models have been suggested to explain the mechanism by which the compressional wave velocity is allowed to vary ...
    • Upward Continuation of Single Profiles of Vertical Magnetic Data 
      Bergsma, Michael William (1976)
      This paper considers the upward continuation of single profiles of vertical magnetic data taken across models where all the information is contained in a single profile. The single profile upward continuation integral ...
    • Velocity Anisotropy in Gulf Coast Carbonates 
      Mugg, Martha (1979)
      Compressional-wave velocities were measured parallel and perpendicular to bedding in five Gulf Coast carbonate samples at atmospheric pressure. In general, the horizontal velocities exceeded the vertical velocities, with ...