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Bulletin of the Seismological Society of America; June 2005; v. 95; no. 3; p. 1181-1185; DOI: 10.1785/0120040193
© 2005 Seismological Society of America
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Short Note

Rapid Assessment of Damage Potential of Earthquakes in Taiwan from the Beginning of P Waves

Yih-Min Wu1 and Hiroo Kanamori2

1 Department of Geosciences
National Taiwan University
Taipei 106, Taiwan
 (Y.-M.W.)

2 Seismological Laboratory
California Institute of Technology
Pasadena, California 91125
 (H.K.)

To rapidly assess the potential for damage of an earthquake for purposes of earthquake early warning in Taiwan, we used the peak displacement and velocity amplitudes of the first 3 sec of the P wave. The vertical-component records, high-pass filtered at 0.075 Hz, are used. We found that the peak initial-displacement amplitude (Pd) correlates well with the peak ground-motion displacement (PGD) and the peak ground-motion velocity (PGV) at the same site. When Pd > 0.5 cm, the event is most likely damaging. If Pd is combined with the period parameter {tau}c, determined in an earlier study, then {tau}c x Pd provides an even more robust parameter for assessing the potential for damage.




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