期刊
EARTHQUAKE SPECTRA
卷 36, 期 3, 页码 1570-1584出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/8755293020911137
关键词
V-S30; site amplification; globalV(S30); mosaicV(S30)map; hybridV(S30)map
Time-averaged shear wave velocity over the upper 30 m of the earth's surface (V-S30) is a key parameter for estimating ground motion amplification as both a predictive and a diagnostic tool for earthquake hazards. The first-order approximation ofV(S30)is commonly obtained through a topographic slope-based or terrain proxy due to the widely available nature of digital elevation models. However, better-constrainedV(S30)maps have been developed in many regions. Such maps preferentially employ various combinations ofV(S30)measurements, higher-resolution elevation models, lithologic, geologic, geomorphic, and other proxies and often utilize refined interpolation schemes. We develop a new hybrid globalV(S30)map database that defaults to the global slope-basedV(S30)map, but smoothly inserts regionalV(S30)maps where available. In addition, we present comparisons of the default slope-based proxy maps against the new hybrid version in terms ofV(S30)and amplification ratio maps, and uncertainties in assignedV(S30)values.
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