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  • Seismology
  • Industrial Chemistry
  • Inorganic Chemistry
  • 2005-2009  (2)
  • 1950-1954
  • 1945-1949
  • 2009  (2)
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  • 2005-2009  (2)
  • 1950-1954
  • 1945-1949
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  • 1
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    DISSEMINATING SEISMOLOGY IN LIGURIA, NORTHERN ITALY (2009)
    Details
    Publication Date: 2017-04-03
    Description: We describe and discuss some activities of our working group to disseminate scientific issues concerning seismology to the students of the Region Liguria.
    Description: Published
    Description: Rimini, Italy
    Description: 5.9. Formazione e informazione
    Description: open
    Keywords: Education ; Seismology ; Preparedness ; 05. General::05.03. Educational, History of Science, Public Issues::05.03.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Abstract
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  • 2
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    Ambient noise analysis and finite difference modelling of VLF borehole seismic data (2009)
    Woods Hole Oceanographic Institution
    Details
    Publication Date: 2022-05-25
    Description: This report describes a preliminary analysis of borehole seismic data to determine VLF/Sub-bottom Seismic Noise in the Atlantic and the preliminary results of finite difference modelling for a Cape Fear environment. Noise levels were not a simple function of depth and there are indications that noise levels may depend on local geology about a given receiver position and/or on clamping. Coherency of the noise was generally poor (〈0.8) and was independent of depth. There is no evidence for distinct polarizations or directionality of the noise. The lowest determined value for ambient noise power on the vertical component was 10-4 nm2/Hz in the frequency range from 5-50 Hz. The better clamped horizontal component had comparable power values. In conclusion, although the drill ship was on the site and drill pipe was in the hole, analysis of the data for a large number of windows can provide meaningful upper bounds on the ambient noise levels in the upper crust.
    Description: Prepared for the Naval Ocean Research and Development Activity as the final report for Contract Purchase Order No. N62306-86-l4-7589
    Keywords: Ambient sounds ; Seismology
    Repository Name: Woods Hole Open Access Server
    Type: Working Paper
    Format: application/pdf
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