Research Information System
Environmental & Engineering Geoscience, vol.1, no.2, pp.191-206, 1995 (Scopus)
Soil column amplifications for 21 sites were computed. The city is underlain by lacustrine and alluvial deposits ranging from about 9 to 41 m in thickness. The computed natural soil periods for the sites are between 0.19 to 0.70 s. Scenario earthquakes representing the worst case and the reasonable case earthquake shaking conditions in the Wabash Valley fault zone and in the New Madrid seismic zone were investigated. The results of site response evaluation show that the soil column amplifications caused by the scenario earthquakes in the Wabash Valley fault zone are in the range of 2-5. The scenario earthquakes in the New Madrid seismic zone resulted in amplifications about twice as great (4-10). In general, the amplification ratios of lacustrine sites were found to be greater than those for alluvial sites. -from Authors