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    Microseism noise in the Philippine Sea [poster] 

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    AGU_Poster_2013_2.pdf (20.95Mb)
    Date
    2013-12
    Author
    Stephen, Ralph A.  Concept link
    Bromirski, Peter D.  Concept link
    Gerstoft, Peter  Concept link
    Worcester, Peter F.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/6747
    Location
    Philippine Sea
    DOI
    10.1575/1912/6747
    Keyword
     Seismic monitoring and test-ban treaty verification; Seismicity and tectonics; Surface waves and free oscillations 
    Abstract
    Microseism noise, generated by wave-wave interaction of ocean surface gravity waves and peaking between 0.1 and 0.5Hz, is the largest amplitude, continuous (acceleration) vibration on earth in the seismic band from 0.0001 to 10Hz. Although microseisms have been studied extensively over the past seventy years, significant issues remain regarding their excitation and propagation. In a recent paper Bromirski et al (JGR, 2013) point out that there is an important distinction between microseisms generated in deep and shallow water. Most microseisms observed on continents are generated in shallow water near coastlines. Microseisms generated in deep water are observed on seafloor sensors but do not transition readily to continents. The Ocean Bottom Seismometer Augmentation to the Philippine Sea (OBSAPS) Experiment has provided a unique opportunity to study the excitation and propagation of microseism noise (from 0.05 to 1.0Hz) in the oceans by combining ocean bottom seismometer observations with co-located and simultaneous observations of the acoustic field in the ocean. The depth dependence of the acoustic field in the ocean is used to distinguish between ocean acoustic modes and acoustic and elastic pseudo-Rayleigh waves as propagation mechanisms for microseism energy.
    Description
    Poster S11B-2359 presented at 2013 Fall Meeting, AGU, San Francisco, Calif., 9-13 Dec.
    Collections
    • Geology and Geophysics (G&G)
    Suggested Citation
    Stephen, R.A., Bromirski, P.D., Gerstoft, P., Worcester, P.F. (2013). Microseism Noise in the Philippine Sea. S11B-2359 presented at 2013 Fall Meeting, AGU, San Francisco, Calif., 9-13 Dec.
     

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