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Regression analysis ofVs30 using topographic attributes from a 50-m DEM

Authors
Journal
Geomorphology
0169-555X
Publisher
Elsevier
Publication Date
Volume
117
Identifiers
DOI: 10.1016/j.geomorph.2009.11.004
Keywords
  • Vs30
  • Shear Wave
  • Regression Analysis
  • Dem
  • Topographic Attribute

Abstract

Abstract The average shear wave velocity for the top 30m (Vs30) is one of the simple predictors of earthquake ground motion amplification. We performed a multiple linear regression analysis of the logarithm of observed Vs30 at 1646 locations in Japan with three topographic attributes (slope gradient, surface texture, and the logarithm of elevation) calculated from a 50-m DEM. A Vs30 map was created using the partial regression coefficients. The determination coefficient was 0.318. The development of the estimation method of Vs30 from a DEM will be useful for earthquake vulnerability assessment.

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