TY - JOUR T1 - Deep seafloor arrivals: An unexplained set of arrivals in long-range ocean acoustic propagation JF - The Journal of the Acoustical Society of America Y1 - 2009 A1 - Stephen, Ralph A. A1 - Bolmer, S. Thompson A1 - Dzieciuch, Matthew A. A1 - Worcester, Peter F. A1 - Andrew, Rex K. A1 - Buck, Linda J. A1 - Mercer, James A. A1 - Colosi, John A. A1 - Howe, Bruce M. AB - Receptions, from a ship-suspended source (in the band 50–100Hz 50 – 100 Hz ) to an ocean bottom seismometer (about 5000m 5000 m depth) and the deepest element on a vertical hydrophone array (about 750m 750 m 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 50to3200km 50 to 3200 km . 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. VL - 126 UR - https://asa.scitation.org/doi/full/10.1121/1.3158826 N1 - Publisher: Acoustical Society of America ER -