Shear wave velocity- and geology-based seismic microzonation of port-au-prince, Haiti

Brady R. Cox, Jeff Bachhuber, Ellen Rathje, Clinton M. Wood, Ranon Dulberg, Albert Kottke, Russell A. Green, Scott M. Olson

Research output: Contribution to journalArticlepeer-review


A seismic site classification microzonation for the city of Port-au-Prince is presented herein. The microzonation is based on 35 shear wave velocity (VS) profiles collected throughout the city and a new geologic map of the region. The VS profiles were obtained using the multichannel analysis of surface waves (MASW) method, while the geologic map was developed from a combination of field mapping and geomorphic interpretation of a digital elevation model (DEM). Relationships between mean shear wave velocity over the upper 30 m of the subsurface (VS30) and surficial geologic unit have been developed, permitting code-based seismic site classification throughout the city. A site classification map for the National Earthquake Hazards Reduction Program=International Building Code (NEHRP=IBC) classification scheme is provided herein. Much of the city is founded on deposits that classify as either NEHRP Site Class C or D, based on VS30. Areas of the city requiring additional subsurface information for accurate site classification are noted.

Original languageEnglish (US)
Pages (from-to)S67-S92
JournalEarthquake Spectra
Issue numberSUPPL. 1
StatePublished - Oct 2011

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geophysics


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