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High Frequency Ground Motion from Fi...

Crempien, Jorge G. F.

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High Frequency Ground Motion from Finite Fault Rupture Simulations.

Record Type:	Electronic resources : Monograph/item
Title/Author:	High Frequency Ground Motion from Finite Fault Rupture Simulations./
Author:	Crempien, Jorge G. F.
Description:	96 p.
Notes:	Source: Dissertation Abstracts International, Volume: 77-07(E), Section: B.
Contained By:	Dissertation Abstracts International77-07B(E).
Subject:	Geophysical engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10011421
ISBN:	9781339472492

High Frequency Ground Motion from Finite Fault Rupture Simulations.
Crempien, Jorge G. F.

High Frequency Ground Motion from Finite Fault Rupture Simulations. - 96 p.

Source: Dissertation Abstracts International, Volume: 77-07(E), Section: B.

Thesis (Ph.D.)--University of California, Santa Barbara, 2015.

There are many tectonically active regions on earth with little or no recorded ground motions. The Eastern United States is a typical example of regions with active faults, but with low to medium seismicity that has prevented sufficient ground motion recordings. Because of this, it is necessary to use synthetic ground motion methods in order to estimate the earthquake hazard a region might have.

ISBN: 9781339472492Subjects--Topical Terms:

3175813
Geophysical engineering.

High Frequency Ground Motion from Finite Fault Rupture Simulations.
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100 1 $a Crempien, Jorge G. F. $3 3276883
245 1 0 $a High Frequency Ground Motion from Finite Fault Rupture Simulations.
300 $a 96 p.
500 $a Source: Dissertation Abstracts International, Volume: 77-07(E), Section: B.
500 $a Adviser: Ralph J. Archuleta.
502 $a Thesis (Ph.D.)--University of California, Santa Barbara, 2015.
520 $a There are many tectonically active regions on earth with little or no recorded ground motions. The Eastern United States is a typical example of regions with active faults, but with low to medium seismicity that has prevented sufficient ground motion recordings. Because of this, it is necessary to use synthetic ground motion methods in order to estimate the earthquake hazard a region might have.
520 $a Ground motion prediction equations for spectral acceleration typically have geometric attenuation proportional to the inverse of distance away from the fault. Earthquakes simulated with one-dimensional layered earth models have larger geometric attenuation than the observed ground motion recordings. We show that as incident angles of rays increase at welded boundaries between homogeneous flat layers, the transmitted rays decrease in amplitude dramatically. As the receiver distance increases away from the source, the angle of incidence of up-going rays increases, producing negligible transmitted ray amplitude, thus increasing the geometrical attenuation.
520 $a To work around this problem we propose a model in which we separate wave propagation for low and high frequencies at a crossover frequency, typically 1Hz.
520 $a The high-frequency portion of strong ground motion is computed with a homogeneous half-space and amplified with the available and more complex one- or three-dimensional crustal models using the quarter wavelength method. We also make use of seismic coda energy density observations as scattering impulse response functions. We incorporate scattering impulse response functions into our Green's functions by convolving the high-frequency homogeneous half-space Green's functions with normalized synthetic scatterograms to reproduce scattering physical effects in recorded seismograms. This method was validated against ground motion for earthquakes recorded in California and Japan, yielding results that capture the duration and spectral response of strong ground motion.
590 $a School code: 0035.
650 4 $a Geophysical engineering. $3 3175813
650 4 $a Geophysics. $3 535228
650 4 $a Geological engineering. $3 2122713
690 $a 0467
690 $a 0373
690 $a 0466
710 2 $a University of California, Santa Barbara. $b Geological Sciences. $3 1264609
773 0 $t Dissertation Abstracts International $g 77-07B(E).
790 $a 0035
791 $a Ph.D.
792 $a 2015
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10011421