Index Catalog // ScholarsArchive@OSU

Creator:: Egbert, Gary D.
Abstract:: I derive probability densities for virtual geomagnetic pole( VGP) longitudes for a general statistical model of local magnetic field variations. I show that even for very simple statistically homogeneous models of secular variation, the distribution of VGP longitudes is peaked 90° away from the sampling longitude. Thus, when sites are...
Resource Type:: Article
Full Text:: , VOL. 19, NO. 23, PAGES 2353-2356, DECEMBER 2, 1992 SAMPLING BIAS IN VGP LONGITUDES Gary D. Egbert

Creator:: Ray, Richard D. and Egbert, Gary D.
Abstract:: How and where the ocean tides dissipate their energy are longstanding questions with both oceanographic and astronomical implications. Two decades ago, Doake suggested that flexing of Antarctic ice shelves by the underlying ocean tide is an important energy sink, perhaps accounting for over half the global dissipation rate. Observational constraints...
Resource Type:: Article
Full Text:: 60øS Richard D. Ray Hughes STX, NASA Goddard Space Flight Center, Greenbelt, Maryland Gary D

Creator:: Unsworth, Martyn, Egbert, Gary D., and Booker, John
Abstract:: Although there is increasing evidence that fluids may play a significant role in the earthquake rupture process, direct observation of fluids in active fault zones remains difficult. Since the presence of an electrically conducting fluid, such as saline pore water, strongly influences the overall conductivity of crustal rocks, electrical and...
Resource Type:: Article
Full Text:: Martyn Unsworth Geophysics Program, University of Washington, Seattle Gary Egbert College of Oceanic

Creator:: Egbert, Gary D. and Booker, John R.
Abstract:: We use data from a series of small (three to five stations) overlapping magnetovariational (MV) arrays to image variations of vertically integrated electrical conductivity in the crust of southwestern Washington. Two principal structures are revealed: a large north-south trending anomaly (the southern Washington Cascades Conductor (SWCC), which has been detected...
Resource Type:: Article
Full Text:: Imaging Crustal Structure in Southwestern Washington With Small Magnetometer Arrays GARY D. EGBERT

Creator:: Egbert, Gary D. and Booker, John R.
Abstract:: In a companion paper (Egbert et al., this issue) we describe the estimation of very long period (0.16 < T < 91 days) magnetotelluric (MT) impedances from 11 years of data collected at the Tucson geomagnetic observatory. Here we discuss the implications of these data for mantle conductivity. Using minimum...
Resource Type:: Article
Full Text:: Conductivity GARY D. EGBERT College of Oceanography, Oregon State University, Corvallis JOHN R. BOOKER

Creator:: Chao, Benjamin Fong, Ray, Richard D., and Egbert, Gary D.
Abstract:: The oceanic tidal angular momentum (OTAM) has Been demonstrated to be the primary cause for the diurnal and semidiurnal variations in the Earth's rotational rate, or ∆UT1. Three ocean tide models derived from the Topex/Poseidon altimetry mission are employed to yield predictions of ∆UT1 for eight major diurnal/semidiurnal tides. The...
Resource Type:: Article
Full Text:: Flight Center, Code 926, Greenbelt, Maryland Gary D. Egbert College of Oceanic and Atmospheric

Creator:: Reed, Gary L., McMorran, J. P., and Carney, D. L.
Resource Type:: Conference Proceeding
Full Text:: Insecticides G. L. Reed, J. P. McMorran, and D. L. Carney Oregon State University,Hermiston

Creator:: Egbert, Gary D., Booker, John R., and Schultz, Adam
Abstract:: Eleven years (1932-1942) of electric potential and magnetic measurement at the Tucson observatory represent a unique very long period magnetotelluric (MT) data set. We report here on a careful reanalysis of this data using modern processing techniques. We have developed and used novel methods for separating out the quasi-periodic daily...
Resource Type:: Article
Full Text:: , 1992 Very Long Period Magnetotellurics at Tucson Observatory: Estimation of Impedances GARY D

Creator:: German, C. R., Klinkhammer, Gary P., and Rudnicki, M. D.
Abstract:: The Rainbow hydrothermal plume was discovered during a recent geophysical survey along 200km of the Mid-Atlantic Ridge (MAR), SW of the Azores Triple Junction, in which at least seven new sites of hydrothermal activity were identified. Here, we present the first hydrographic study of the Rainbow plume, 36° 15'N, the...
Resource Type:: Article

Creator:: Egbert, Gary D., Bennett, Andrew F., and Foreman, Michael G. G.
Abstract:: Altimetric data from the TOPEX/POSEIDON mission will be used for studies of global ocean circulation and marine geophysics. However, it is first necessary to remove the ocean tides, which are aliased in the raw data. The tides are constrained by two distinct types of information: the hydrodynamic equations which the...
Resource Type:: Article
Full Text:: tides estimated using a global inverse model Gary D. Egbert and Andrew F. Bennett College of Oceanic

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