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List of Slides
- Slide 0: syn.gif Fig. 1. Synthetic vertical, v(t), and radial-horizontal, r(t), impulse responses and receiver function, F(t), for a simple model with a 30 km thick crust. Inset: Schematic of selected raypaths, with shear raypaths in gray. This example was computed using Menke's (2000) SPLITTING_MODELLER software.
- Slide 1: ev128.gif Fig. 2. Sample impulse responses, riest(t), viest(t) and the receiver functions, Fest(t) for an earthquake in El Salvador (range = 30.7 deg) observed at PAL. A) Broadband vertical, V(t), and radial-horizontal, R(t), components. B) Sequence of viest(t) for L increasing from 1 to 5. C) Sequence of riest(t). D) Sequence of Fiest(t). E) Sequence of observed (bold) and predicted (solid) radial-horizontal seismograms, R(t). The misfit, as defined by Eqn. 8, decreases from 0.034 for L=1 to 0.003 for L=5, about an order of magnitude improvement.
- Slide 2: E.gif Fig. 3. A) Error, as defined by equation 8, of impulse response function determinations, as a function of the number of pulses, L. B) Error, as defined by equation 10, of receiver function determinations, as a function of the number of pulses, L.
- Slide 3: rfcn.baz.gif Fig. 4. Estimated receiver function, Fest(t), plotted by backazimuth of the earthquake. A) L=2. B) L=3. C) L=4. D) L=5.
- Slide 4: rfcn2.baz.gif Fig 5. Estimated receiver function, F'est(t), plotted by backazimuth of the earthquake. A) L=2. B) L=3. C) L=4. D) L=5.
- Slide 5: mohoplot.gif Fig. 6. Apparent Moho depth, plotted as a function of backazimuth, phi. Circles: Depth estimates based on Ps arrivals from three-pulse calculation, calculated for a nominal mean crustal compressional and shear velocities of of 6.50 and 3.69 km/s, respectively. (Solid line) Best fit sinusoid, 32.62+6.93cos(phi-292), indicating that the Moho dips down towards the northwest.
- Slide 6: var.gif Fig. 7. (Top) Sine of the apparent angle of incidence, theta, inferred from the amplitude of the P-wave pulse on the L=3 vertical and radial-horizontal impulse response functions, as a function of the slowness, p, of the teleseism as inferred from the IASPEI Tables (Kennett 1991). The data (circles) are compared with a best fit straight line with slope of 6.03 km/s (solid curve). (Bottom) Deviations of the sin(theta) data (circles) from the straight line fit as function of the backazimuth of the teleseism. Solid curve: best fit cosine.