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Journals & Magazines >IEEE Transactions on Geoscien... >Volume: 46 Issue: 8

Automatic P-Phase Picking Based on Local-Maxima Distribution

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Costas Panagiotakis; Eleni Kokinou; Filippos Vallianatos
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Abstract

Document Sections

  • I.
    Introduction
  • II.
    Properties of LMD
  • III.
    $P$-Phase Picking Based on LMD
  • IV.
    Experimental Results
  • V.
    Conclusion
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Abstract:

In this paper, we propose a method for the automatic identification of P-phase arrival based on the distribution of local maxima (LM) in earthquake seismograms. The metho...Show More

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Abstract:

In this paper, we propose a method for the automatic identification of P-phase arrival based on the distribution of local maxima (LM) in earthquake seismograms. The method efficiently combines energy and frequency characteristics of the LM distribution (LMD). The detection is mainly based on the energy of a seismic event in the case the earthquake has higher amplitude than seismic background noise. Otherwise, it is based on the frequency of LM. Thus, the method provides robust detection of P-phase arrival in any quality type of seismic data. Moreover, it uses two sequential sliding signal windows yielding very high accuracy on the P-phase estimation. A hierarchical P-phase detection algorithm dramatically reduces the computational cost, making possible a real-time implementation. Experimental results from a large database of more than 80 low, medium, and high signal-to-noise ratio seismic events and comparison with existing methods in the literature indicate the reliable performance of the proposed scheme.
Published in: IEEE Transactions on Geoscience and Remote Sensing ( Volume: 46, Issue: 8, August 2008)
Page(s): 2280 - 2287
Date of Publication: 27 June 2008

ISSN Information:

DOI: 10.1109/TGRS.2008.917272
Contents

I. Introduction

Earthquake is the shaking and vibration at the surface of the Earth resulting from underground movement along a fault plane or from volcanic activity, producing seismic waves. Seismic waves are studied through records of mechanical vibrations of the Earth (seismic traces). These records register the effect from different types of waves originating from a certain point or plane, i.e., the earthquake source in the interior of the Earth on its surface [1].

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