CHARACTERISTICS OF TAIWANS SEISMICITY

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CHARACTERISTICS OF TAIWANS SEISMICITY

• Tsui-Yu Chang,
• Kuo-Fong Ma,
• and Yi-Ben Tsai
•  Institute of Geophysics, National Central
  University,
• No.300, Jung-da Rd., Jung-li City, Taoyuan,
  Taiwan 320
• Tel [phone] ext. 5617

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Seismicity of Taiwan
more than 270,000 events from 1973 to 2002, in
the border of 119E123E and 21N26N.
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• Seismicity Catalog of the Central Weather Bureau
  of Taiwan, including instrumental records for
  more than one century (1900 present).
• Composing with varied local catalogs (well
  represented by S. N. Cheng, Y. T. Yeh, C.Y.
  Wang, J.H. Wang, and CWB Meteorological report,
  etc).

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Variation of seismicity rate
Z-test
R1 et R2 , les taux moyens de sismicité
caractérisant chaque période  ?1 et ? 2, les
déviations standard correspondant à la période
indiquée N1 et N2 sont les nombres des
échantillons. (c.f. Meyer, 1975, pp. 235, 280).
Logiciel ZMAP (e.g. Wiemer 2001) R1
enregistrements de 1994,3 à 1999,6 (78 174
événements). R2 enregistrements de différentes
périodes de 6 mois
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Seismic rate change
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FUTURE WORKS

• further statistical determination of spatial and
  
• temporal variations of seismicity rate as
  significant
• symptom of large earthquakes occurrence.
• stress transfer and seismicity changes before
• large earthquake.
• evolution of seismicity between large
• earthquakes.

PERSPECTIVES