Abstract
The seismic intensity attenuation relations in northeastern Tibetan Plateau region are established by a regression analysis on isoseismal data. Then the attenuation relations for horizontal peak ground acceleration and short-period response spectrum for western North America are derived based on the database of HUO Jun-rong and strong motion data from recent earthquakes. The attenuation relations of long-period response spectrum for western North American are developed by analyzing the broadband digital seismic recordings of southern California. By integrating the short-period and long-period attenuation relationships, the attenuation relations for horizontal acceleration response spectrum in the period range of 0.04–6 s for western North America are established. The attenuation equation that accounts for the magnitude saturation and near-field saturation of high frequency ground motion is used. Finally the attenuation relations for horizontal peak ground acceleration and response spectrum for the region of northeastern Tibetan Plateau are developed by using the transforming method.
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Foundation item: The Special Funds for Major State Basic Research Project under Grant No. 2002CB412706 and National Natural Science Foundation of China (40374017).
Contribution No. 04FE1016, Institute of Geophysics, China Earthquake Administration.
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Yu, Yx., Wang, Sy. Attenuation relations for horizontal peak ground acceleration and response spectrum in northeastern Tibetan Plateau region. Acta Seimol. Sin. 17, 651–661 (2004). https://doi.org/10.1007/s11589-004-0004-6
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DOI: https://doi.org/10.1007/s11589-004-0004-6