Title page for ETD etd-2143122449761431


Type of Document Master's Thesis
Author Student, Heather H.
URN etd-2143122449761431
Title Assessing the Seismic Hazard in Charleston, South Carolina: Comparisons Among Statistical Models
Degree Master of Science
Department Geological Sciences
Advisory Committee
Advisor Name Title
Martin, James R. II
Robinson, Edwin S.
Snoke, J. Arthur Committee Chair
Keywords
  • seismic hazard
  • intraplate earthquakes
  • strong ground motion
  • paleoliquefacation
  • charleston
  • south carolina
Date of Defense 1997-01-27
Availability unrestricted
Abstract
Seismic hazard calculations for sites in eastern North

America have traditionally assumed a Poisson process to

describe the temporal behavior of earthquakes and have

employed the Gutenberg-Richter relationship to define the

frequency distribution of earthquake magnitude. For sites

in areas where geological information indicates recurrent,

large earthquakes, however, such data imply a rate for

large events which often exceeds that predicted by the

Gutenberg-Richter relationship. One way in which this

discrepancy can be reconciled is to assume that the larger

events occur as a time-dependent, or renewal, process

and possess a "characteristic earthquake" magnitude

distribution. The main purpose of this study is to make a

quantitative comparison of seismic hazard estimates for

Charleston of the influences of 1) the Poisson temporal

model assuming the Gutenberg-Richter and characteristic

earthquake magnitude recurrence relationships with 2) the

renewal temporal model assuming the characteristic

magnitude recurrence relationship. Other issues that are

examined are the sensitivity of uncertainties of hazard

model parameters such as maximum magnitude and

seismic source delineation.

Probabilistic seismic hazard calculations for the next 50

years were performed at Charleston for all potential

seismic sources. The highest estimate of seismic hazard

was obtained with the Poisson temporal model and

characteristic earthquake recurrence relationship. The

lowest hazard was obtained with the renewal temporal

model and characteristic magnitude recurrence

relationship. The results of this study are in good

agreement with hazard estimates for Charleston in the most

recent national seismic hazard maps.

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