000011325 001__ 11325
000011325 005__ 20141205155859.0
000011325 04107 $$aeng
000011325 046__ $$k2008-10-12
000011325 100__ $$aPeng，F.,
000011325 24500 $$aSimulation of Microtremor H/V Response to Three Simple Sediment/Structure Models

000011325 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011325 260__ $$b
000011325 506__ $$arestricted
000011325 520__ $$2eng$$aIn order to evaluate the 2D effects of sediment thickness variation on the resonant frequency of the horizontal to vertical spectral ratio (H/V) of the microtremor measurements, we numerically simulated the ambient noise superposition and interference in three sediment models: the flat layer sediment, a dip layer sediment and a thrust fault, with the 2D finite difference time domain (FDTD) method. First, we created the sediment/structure model. Second, we used the FDTD method to simulate the propagation of the ambient noise with the excitation of the randomly distributed noise sources in the uppermost part of the crust. The responses of the model were recorded at the receiver arrays on the surface. Then, the synthetic ambient data were processed with the horizontal to vertical component H/V spectral ratio method to extract the variation of the resonant frequency for a given sediment structure. We compared the H/V derived sediment thickness results with the initial models and found that simulation results can produce credible images of the subsurface structure which can matched with the initial models in a great agreement. We conclude that numerical simulation of microtremors with the FDTD method can provide a reference model for the purpose of planning real-world field measurement and assisting the comprehension of field H/V results. This work is supported by the Ministry of Science and Technology of China with Project No. 2006DFA21650 and the Institute of Earthquake Science with Project No. 0207690229.

000011325 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011325 653__ $$aFDTD, simulation, microtremor, sediment, H/V spectral ratio

000011325 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011325 720__ $$aPeng，F.,$$iLiu，L.,$$iHuang，L.,$$iZhu，L.,$$iChen，Q.,
000011325 8560_ $$ffischerc@itam.cas.cz
000011325 8564_ $$s4155095$$uhttps://invenio.itam.cas.cz/record/11325/files/03-03-0028.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 03-03-0028.
000011325 962__ $$r9324
000011325 980__ $$aPAPER