KUKU

KU ScholarWorks

  • myKU
  • Email
  • Enroll & Pay
  • KU Directory
    • Login
    View Item 
    •   KU ScholarWorks
    • Geology
    • Geology Scholarly Works
    • View Item
    •   KU ScholarWorks
    • Geology
    • Geology Scholarly Works
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Practical modifications to improve the sledgehammer source

    Thumbnail
    View/Open
    SteeplesD_GRL_21(20)2203.pdf (463.4Kb)
    Issue Date
    1994-10-01
    Author
    Keiswetter, Dean
    Steeples, Don W.
    Publisher
    American Geophysical Union
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Metadata
    Show full item record
    Abstract
    We have examined frequency and amplitude changes in high-resolution seismic-reflection data associated with practical modifications to the sledgehammer method. Our seismic data, acquired at three sites with different near-surface geology, demonstrate the effects of seating the plate prior to recording, of centered versus noncentered impacts, of subsurface plate emplacement, of various plate-surface covers, and of aluminum versus steel impact plates. Impacts on well-seated plates produced as much as 4 dB higher seismic amplitude than data recorded using unseated plates, and increased the ratio of high-to-low frequencies. Sledgehammer impacts on the edge of the plate decreased seismic amplitude by 6 to 12 dB for frequencies above 100 Hz compared to centered impacts. Placement of the impact plate 1 meter below the ground surface produced a 12 dB amplitude increase for frequencies above 130 Hz at one test site. Plates made of either steel alloy or aluminum produced equivalent seismic signals. The site-dependent nature of some of our results suggests that other investigators may benefit from conducting similar experiments prior to acquiring shallow seismic-reflection data when using the sledgehammer source.
    Description
    This is the publisher's version, also available electronically from "http://onlinelibrary.wiley.com".
    URI
    http://hdl.handle.net/1808/17257
    DOI
    https://doi.org/10.1029/94GL01957
    ISSN
    0094-8276
    Collections
    • Geology Scholarly Works [245]
    Citation
    Keiswetter, D. & Steeples, D. (1994), Practical modifications to improve the sledgehammer seismic source. Geophysical Research Letters, 21: 2203–2206, http://www.dx.doi.org/10.1029/94GL01957

    Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.


    We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.


    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    Browse

    All of KU ScholarWorksCommunities & CollectionsThis Collection

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    The University of Kansas
      Contact KU ScholarWorks
    Lawrence, KS | Maps
     
    • Academics
    • Admission
    • Alumni
    • Athletics
    • Campuses
    • Giving
    • Jobs

    The University of Kansas prohibits discrimination on the basis of race, color, ethnicity, religion, sex, national origin, age, ancestry, disability, status as a veteran, sexual orientation, marital status, parental status, gender identity, gender expression and genetic information in the University’s programs and activities. The following person has been designated to handle inquiries regarding the non-discrimination policies: Director of the Office of Institutional Opportunity and Access, IOA@ku.edu, 1246 W. Campus Road, Room 153A, Lawrence, KS, 66045, (785)864-6414, 711 TTY.

     Contact KU
    Lawrence, KS | Maps