Waveform Station Anomaly -Definition and Example for J-Array Stations-

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We introduce the waveform station anomaly (WSA) of teleseismic P-waves to investigate the crustal and uppermost mantle structure beneath stations, which is a natural extension of relative travel-time and amplitude anomalies. WSA is defined as the observed waveform deconvolved by the average waveform of stations in an array. Since source time function and mantle response are almost identical across the array and cancelled out by the deconvolution, WSA approximately represents the effect of the receiver structure and the instruments peculiar to each station. The procedure was applied to short-period teleseismic waveforms recorded by the J-Array, a large-aperture and short-period seismic array covering the entire Japanese Islands. WSA was consistently determined for a cluster of deep events in the Tonga-Fiji region, with almost identical back azimuth and incidence angle. Especially, near-station reverberations inherent to each station were effectively extracted by the deconvolution. However, relative travel-time residuals showed a slight scatter due to the unequal number of stations used for analysis of each event. Despite the small number of events used in this study, WSA clearly changes with the arrival direction, which indicates that we have to consider a laterally heterogeneous structure beneath the Japanese Islands to explain the observed WSA.

収録刊行物

  • Journal of physics of the earth  

    Journal of physics of the earth 44(6), 675-685, 1996-12-01 

    The Seismological Society of Japan, The Volcanological Society of Japan , The Geodetic Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002428435
  • NII書誌ID(NCID)
    AA00704960
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00223743
  • NDL 記事登録ID
    4187981
  • NDL 雑誌分類
    ZM41(科学技術--地球科学)
  • NDL 請求記号
    Z53-B237
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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