scholarly journals Application of Empirical Green's Functions in Earthquake Source, Wave Propagation and Strong Ground Motion Studies

10.5772/28189 ◽  
2012 ◽  
Author(s):  
Lawrence Hutchings ◽  
Gisela Viegas
Keyword(s):  
Wave Propagation ◽  
Ground Motion ◽  
Green's Functions ◽  
Strong Ground Motion ◽  
Earthquake Source ◽  
Empirical Green’S Functions ◽  
Motion Studies ◽  
Source Wave ◽  
Empirical Green's Functions ◽  
Strong Ground

The Mexico Earthquake of September 19, 1985—Effect of Magnitude on the Character of Strong Ground Motion: An Example from the Guerrero, Mexico Strong Motion Network

1988 ◽  
Vol 4 (3) ◽  
pp. 635-646 ◽  
Author(s):  
J. G. Anderson ◽  
R. Quaas
Keyword(s):  
Subduction Zone ◽  
Ground Motion ◽  
Strong Ground Motion ◽  
Strong Motion ◽  
Earthquake Source ◽  
Hypocentral Distance ◽  
Source Theory ◽  
Mexico Earthquake ◽  
Strong Motion Network ◽  
Strong Ground

The Guerrero digital accelerograph network has been operating, since spring of 1985, on rock sites along the coast of Mexico, above an active subduction zone. The accelerograms collected through June 1987 include examples from events with magnitudes from 3 to 8, all recorded at nearly the same hypocentral distance. Spectra from these accelerograms scale in a manner that is qualitatively consistent with earthquake source theory. Based on four selected events, peak accelerations attenuate more rapidly for small events than for large events.

The Whittier Narrows, California Earthquake of October 1, 1987—Note on Peak Accelerations during the 1 and 4 October Earthquakes

1988 ◽  
Vol 4 (1) ◽  
pp. 101-113 ◽  
Author(s):  
M. D. Trifunac
Keyword(s):  
Wave Propagation ◽  
Los Angeles ◽  
Ground Motion ◽  
Strong Ground Motion ◽  
Strong Dependence ◽  
Three Dimensional ◽  
Physical Processes ◽  
Los Angeles Basin ◽  
Dense Arrays ◽  
Strong Ground

Attenuation patterns of the recorded peak accelerations during two moderate earthquakes (ML = 5.9 and 5.3) in Los Angeles, California are described. It is shown that the recording of earthquake motions by dense arrays of accelerographs can yield a detailed and deterministic picture of the physical processes which are involved in shaping the observed variations of strong ground motion. For the two earthquakes the observed changes of peak amplitudes with respect to the azimuth and distance are slowly and continuously changing functions showing strong dependence of amplitudes on the radiation patterns of the two earthquakes and on the effects of wave propagation through irregular three-dimensional geology of the Los Angeles basin.

scholarly journals A technique for simulating strong ground motion using hybrid Green's function

1998 ◽  
Vol 88 (2) ◽  
pp. 357-367 ◽  
Author(s):  
Katsuhiro Kamae ◽  
Kojiro Irikura ◽  
Arben Pitarka
Keyword(s):  
Green’S Function ◽  
Ground Motion ◽  
Green's Function ◽  
Green's Functions ◽  
Strong Ground Motion ◽  
Green’S Functions ◽  
Ground Motions ◽  
Large Earthquake ◽  
Long Period ◽  
Strong Ground

Abstract A method for simulating strong ground motion for a large earthquake based on synthetic Green's function is presented. We use the synthetic motions of a small event as Green's functions instead of observed records of small events. Ground motions from small events are calculated using a hybrid scheme combining deterministic and stochastic approaches. The long-period motions from the small events are deterministically calculated using the 3D finite-difference method, whereas the high-frequency motions from them are stochastically simulated using Boore's method. The small-event motions are synthesized summing the long-period and short-period motions after passing them through a pair of matched filters to follow the omega-squared source model. We call the resultant time series “hybrid Green's functions” (HGF). Ground motions from a large earthquake are simulated by following the empirical Green's function (EGF) method. We demonstrate the effectiveness of the method at simulating ground motion from the 1995 Hyogo-ken Nanbu earthquake (Mw 6.9).

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