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Article

Modeling of Seafloor Soft Marine Sediments and Spectral Characteristics of Earthquakes Recorded on the Gulf of Mexico

[+] Author and Article Information
Carlos I. Huerta-Lopez

Department of Seismology Research Center and Higher Education at Ensenada, CICESE Ensenada, B.C., México, U.S.A. mailing address: P.O. Box 434843, San Diego, CA 92143e-mail: m-huerta@alumni.utexas.net

Kenneth H. Stokoe, Celestino Valle-Molina

Department of Civil Engineering/ Geotechnical Engineering, University of Texas at Austin, Austin, TX 78712

Jay Pulliam

Institute for Geophysics, The University of Texas at Austin, 4412 Spicewood Springs Road, Building 600, Austin, TX 78759-8500e-mail: jay@utig.ig.utexas.edu

José M. Roësset

Department of Civil Engineering, CE/TTI Building, Room 705F, TAMUS-3136 Texas A&M University, College Station, TX 77843-3136e-mail: jroesset@tamu.edu

J. Offshore Mech. Arct. Eng 127(1), 59-67 (Mar 23, 2005) (9 pages) doi:10.1115/1.1854696 History: Received February 02, 2004; Revised May 21, 2004; Online March 23, 2005
Copyright © 2005 by ASME
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References

Figures

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UTIG ocean bottom seismograph (OBS) package. From Huerta-Lopez et al. 8.
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12-hour simulated drum record measured with the UTIG BBOBS. Seafloor ground motion of vertical component.
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Time series of four of the studied earthquakes; first column: Gulf of California, and Chiapas; second column: California–Nevada, and Ecuador
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Chiapas earthquake PSD characteristics. Time windows of 50–800 s, 50–150 s, 150–350 s, 50–300 s, 300–500 s, and 550–800 s corresponds to the whole record, to the arrivals of P-, S-, P- & S-together, coda portion of S-arrival, and the T-phase, respectively.
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Gulf of California earthquake PSD characteristics. Time windows of 1–2000 s, 500–900 s, 900–1500 s, 500–1500 s, 1500–2000 s, and 1–550 s corresponds to the whole record, to the arrivals of P-, S-, P- & S-together, coda portion of the S-arrival and a noise portion at beginning of record, respectively.
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Ecuador earthquake PSD characteristics. Time windows of 150–3500 s, 150–1000 s, 1000–2000 s, 150–2000 s, and 2000–3500 s corresponds to the whole record, to the arrivals of P-, S-, P- & S-together, and coda portion of S-arrival, respectively.
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California–Nevada earthquake PSD characteristics. Time windows of 1–2100 s, 200–600 s, 600–1500 s, 200–1500 s, and 1600–2100 s corresponds to the whole record, to the arrivals of P-, S-, P- & S-together, and the coda portion of the S-arrival, respectively.
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SH-wave traveling in an isolated single layer
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H/V spectral ratios from background noise
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H/V spectral ratio from earthquake data
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Transfer functions of layered soil system
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Location of GOM experimental site. Modified from Huerta-Lopez et al. 8.

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