HR: 0800h
AN: T51B-0453    [Abstracts]
TI: Full Wave Calculation of the Source Characteristics of Seismogenic Electromagnetic Signals as Observed at LEO Satellite Altitudes
AU: * Bortnik, J
EM: jbortnik@stanford.edu
AF: QuakeFinder, 250 Cambridge Avenue, Suite 204 , Palo Alto, CA 94306 United States
AU: Bleier, T
EM: tbleier@quakefinder.com
AF: QuakeFinder, 250 Cambridge Avenue, Suite 204 , Palo Alto, CA 94306 United States
AB: We perform a numerical analysis of the propagation of electromagnetic waves that originate below the Earth's surface and are observed at low Earth orbit (LEO) altitudes, in support of recent missions such as QuakeSat I and Demeter, whose primary objective is the detection and identification of seismogenic electromagnetic signals. For our investigation we subdivide the intervening medium between source and observation into a large number of horizontally stratified, anisotropic slabs and solve the full-wave equations using the matrix method introduced by Nagano et al. [1975]. The effects of the altitude variations of the conducting ground, ionospheric electron density and collision frequency, as well as ion composition are easily included in our model, and we present results as a function of wave frequency and initial wave normal angle for the example case of the Dec. 22 2004, M6.4 San Simeon earthquake.
DE: 7299 General or miscellaneous
DE: 2487 Wave propagation (6934)
DE: 0644 Numerical methods
DE: 0654 Plasmas
DE: 0689 Wave propagation (4275)
SC: Tectonophysics [T]
MN: 2004 AGU Fall Meeting