Site effects at a vertical accelerometer array near Paducah, Kentucky

R. Street, Z. Wang, E. Woolery, J. Hunt, J. Harris

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The downhole vertical accelerometer array VSAP near Paducah, KY, consists of three-component accelerometers at the surface, the top of the McNairy Formation (-41 m), and the top of the Paleozoic bedrock (-99 m). The array is at the northern end of the Mississippi Embayment, and it was installed to verify the ground-motion modeling for the site, assuming a significant earthquake in the New Madrid Seismic Zone. Accelerograms from 4.2 and 2.0 mb earthquakes were used to check aspects of the modeling pertaining to linear behavior of the soil column, and to review the soil column models derived by drilling and geotechnical methods and through the use of high-resolution P- and SH-wave seismic refraction and reflection techniques. Results of the study indicate that for the linear case the soil column models derived by the two techniques are equivalent, and that the most important boundary in the soil column, with respect to amplification of the ground motions, is the interface between the limestone bedrock and soil.

Original languageEnglish
Pages (from-to)349-367
Number of pages19
JournalEngineering Geology
Volume46
Issue number3-4
DOIs
StatePublished - Jul 15 1997

Bibliographical note

Funding Information:
This research was supported by Martin Marietta Energy Systems and the Kentucky Geological Survey. The views and conclusions contained in this document are those of the authors, and should not be interpreted as necessarily representing policies, either expressed or implied, of Martin Marietta Energy Systems or the Kentucky Geological Survey.

Keywords

  • Paducah, Kentucky
  • Site effects
  • Vertical accelerometer array

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geology

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