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|Title:||Shallow-water seismoacoustic noise generated by tropical storms Ernesto and Florence|
|Citation:||Journal of the Acoustical Society of America, 2008; 124(3):EL170-EL176|
|Publisher:||Acoustical Soc Amer Amer Inst Physics|
|James Traer, Peter Gerstoft, Peter D. Bromirski, William S. Hodgkiss, and Laura A. Brooks|
|Abstract:||Land-based seismic observations of double frequency (DF) microseisms generated during tropical storms Ernesto and Florence are dominated by signals in the 0.15-0.5 Hz band. In contrast, data from sea floor hydrophones in shallow water (70 m depth, 130 km off the New Jersey coast) show dominant signals in the ocean gravity-wave frequency band, 0.02-0.18 Hz, and low amplitudes from 0.18 to 0.3 Hz, suggesting significant opposing wave components necessary for DF microseism generation were negligible at the site. Florence produced large waves over deep water while Ernesto only generated waves in coastal regions, yet both storms produced similar spectra. This suggests near-coastal shallow water as the dominant region for observed microseism generation.|
|Keywords:||Sound Spectrography; Wind; Noise; Geologic Sediments; Acoustics; Pressure; Models, Theoretical; New Jersey; Atlantic Ocean; Cyclonic Storms|
|Appears in Collections:||Mechanical Engineering publications|
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