Microseism noise in the Philippine Sea [poster]
Stephen, Ralph A.
Bromirski, Peter D.
Worcester, Peter F.
MetadataShow full item record
KeywordSeismic monitoring and test-ban treaty verification; Seismicity and tectonics; Surface waves and free oscillations
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.
Poster S11B-2359 presented at 2013 Fall Meeting, AGU, San Francisco, Calif., 9-13 Dec.
Suggested CitationPresentation: Stephen, Ralph A., Bromirski, Peter D., Gerstoft, Peter, Worcester, Peter F., "Microseism noise in the Philippine Sea [poster] ", Poster S11B-2359 presented at 2013 Fall Meeting, AGU, San Francisco, Calif., 9-13 Dec., DOI:10.1575/1912/6747, https://hdl.handle.net/1912/6747
Showing items related by title, author, creator and subject.
Seafloor seismic monitoring of an active submarine volcano : local seismicity at Vailulu'u Seamount, Samoa Konter, Jasper G.; Staudigel, Hubert; Hart, Stanley R.; Shearer, Peter M. (American Geophysical Union, 2004-06-26)We deployed five ocean bottom hydrophones (OBHs) for a 1-year seismic monitoring study of Vailulu'u Seamount, the youngest and easternmost volcano in the Samoan Archipelago. Four instruments were placed on the summit crater ...
Near-surface environmentally forced changes in the Ross Ice Shelf observed with ambient seismic noise Chaput, Julien; Aster, Richard C.; McGrath, Daniel; Baker, Michael G.; Anthony, Robert E.; Gerstoft, Peter; Bromirski, Peter D.; Nyblade, Andrew A.; Stephen, Ralph A.; Wiens, Douglas A.; Das, Sarah B.; Stevens, Laura A. (John Wiley & Sons, 2018-10-16)Continuous seismic observations across the Ross Ice Shelf reveal ubiquitous ambient resonances at frequencies >5 Hz. These firn‐trapped surface wave signals arise through wind and snow bedform interactions coupled with ...
Ice shelf structure derived from dispersion curve analysis of ambient seismic noise, Ross Ice Shelf, Antarctica Diez, Anja; Bromirski, Peter D.; Gerstoft, Peter; Stephen, Ralph A.; Anthony, Robert E.; Aster, Richard C.; Cai, Chen; Nyblade, Andrew A.; Wiens, Douglas A. (Oxford University Press, 2016-02-16)An L-configured, three-component short period seismic array was deployed on the Ross Ice Shelf, Antarctica during November 2014. Polarization analysis of ambient noise data from these stations shows linearly polarized waves ...