Active collaboration between the CTBTO-IMS and the broader worldwide scientific community has the potential to benefit all participants. Benefits to the CTBTO-IMS An improved understanding of the role of bottom interaction in longrange ocean acoustic propagation and of the coupling of seismic energy from the deep seafloor into the SOFAR channel will help the CTBTO to optimize the results from the IMS hydro-acoustic network.- improved locations of events- improved discrimination of explosions from earthquakes- improved estimates of the magnitude of eventsBenefits to the Broader Scientific Community The IMS hydro-acoustic network provides an excellent worldwide database that will be a valuable resource for research in:- marine geology- marine biology- weather and climate- oceanography- seismology- cryo-seismology and glaciology- tsunamis The IMS hydro-acoustic database will complement data from other permanent and short-term oceanic seismo-acoustic networks. History- Long-range Ocean Sound Propagation- 1960 The first observation of ocean sound propagation half-way around the earth and the suggestion that underwater sound can be used to detect an underwater atomic blast. The source was a 300lb depth charge
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