Receptions, from a ship-suspended source (in the band ) to an ocean bottom seismometer (about depth) and the deepest element on a vertical hydrophone array (about above the seafloor) that were acquired on the 2004 Long-Range Ocean Acoustic Propagation Experiment in the North Pacific Ocean, are described. The ranges varied from . In addition to predicted ocean acoustic arrivals and deep shadow zone arrivals (leaking below turning points), “deep seafloor arrivals,” that are dominant on the seafloor geophone but are absent or very weak on the hydrophone array, are observed. These deep seafloor arrivals are an unexplained set of arrivals in ocean acoustics possibly associated with seafloor interface waves.
Deep seafloor arrivals: An unexplained set of arrivals in long-range ocean acoustic propagation
Ralph A. Stephen, S. Thompson Bolmer, Matthew A. Dzieciuch, Peter F. Worcester, Rex K. Andrew, Linda J. Buck, James A. Mercer, John A. Colosi, Bruce M. Howe; Deep seafloor arrivals: An unexplained set of arrivals in long-range ocean acoustic propagation. J. Acoust. Soc. Am. 1 August 2009; 126 (2): 599–606. https://doi.org/10.1121/1.3158826
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