The vertical response of an ocean bottom seismometer: Analysis of the Lopez Island vertical transient tests |
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| Authors: | Steven J Zelikovitz William A Prothero Jr |
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| Institution: | (1) Department of Geological Sciences, Marine Science Institute, University of California, 93106 Santa Barbara, CA, USA |
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| Abstract: | A lumped-parameter model was developed to predict the response of an ocean bottom seismometer, resting on relatively non-stiff sediments, to vertical ground-motion. The model predictions were compared with the response of an instrument on a foundation of foam rubber to a sinusoidal input. Comparison of the model data to the measured Lopez Island vertical transient test data showed that bearing pressure of the instrument in a nonuniform vertical soil profile causes certain instruments to experience a shear modulus higher than the mean. |
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