A new instrumental measure of epicentral shaking intensity in Western China

作者：Wang, Yushi^*; Li, Xiaojun; Zhou, Zhenghua

来源：Bulletin of Earthquake Engineering, 2013, 11(4): 913-924.

DOI：10.1007/s10518-013-9428-5

• Instrumental seismic intensity
• Spectrum intensity
• Strong ground motion
• Macro-seismic intensity
• Wenchuan earthquake

We define here a new measure of epicentral shaking intensity (modified spectrum intensity), which we derive from strong motion instrumental data. This new metric is similar to Housner's spectrum intensity, with the caveat that we modify its numerical value by evaluating the predominant period of spectral acceleration and the site characteristics of each strong-motion station. We find that the modified spectrum intensity thus calculated is of higher reliability than peak ground acceleration, peak ground velocity, or Housner's spectrum intensity in instrumental seismic intensity determination, and it offers a superior method to evaluate macro-seismic intensity distribution soon after a destructive earthquake in Western China.

• 出版日期2013-8
• 单位中国地震局; 南京工业大学