Spectral characteristics of earthquakes recorded on the gulf of México seafloor and modeling of soft marine sediments

Carlos I. Huerta López, Jay Pulliam, Kenneth H. Stokoe, José M. Roësset, Celestino Valle-Molina

Research output: Contribution to conferencePaper

Abstract

The overall goal of this work was to develop a costeffective method of characterizing offshore geotechnical sites in deep water. The generic approach was to place an ocean bottom seismograph on the seafloor and record ambient noise and distant earthquakes over periods of a month or more. Horizontal-to-vertical (H/V) spectral ratios were then calculated and used to characterize the local sediment response in terms of the distribution of motions with their respective resonant frequencies. One-dimensional wave propagation modeling using the stiffness matrix method was used to estimate sediment properties (mainly layering, shear stiffness, density and material damping) by matching the resonant frequency and amplification factors of the shallow sediment layers. The resulting sediment properties fall well within the expected range, indicating the potential of the proposed exploration approach for characterizing deep water sites.
Original languageAmerican English
Pages895-903
Number of pages804
DOIs
StatePublished - 17 Dec 2003
Externally publishedYes
EventProceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE -
Duration: 21 Dec 2007 → …

Conference

ConferenceProceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Period21/12/07 → …

    Fingerprint

Cite this

Huerta López, C. I., Pulliam, J., Stokoe, K. H., Roësset, J. M., & Valle-Molina, C. (2003). Spectral characteristics of earthquakes recorded on the gulf of México seafloor and modeling of soft marine sediments. 895-903. Paper presented at Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE, . https://doi.org/10.1115/OMAE2003-37504