HR: 0800h
AN: NG41B-0525    [Abstracts]
TI: Earthquake Scaling Laws and Seismic Hazard and Risk Analyses
AU: * Wang, Z
EM: zmwang@uky.edu
AF: Kentucky Geological Survey, 228 MMRB University of Kentucky, Lexington, KY 40506, United States
AB: In flood and wind hazard analyses, a hazard level and associated recurrence interval, such as peak discharge of a 100-year flood and 3-second gust wind speed of a 50-year storm, must be known at a specific site. Similarly, ground motion hazard with a recurrence interval at a specific site can be derived from earthquake spatial and temporal scaling laws. In seismology, earthquake magnitude and occurrence frequency follow the Gutenberg- Richter (temporal) relationship between the cumulative number of earthquakes and magnitude. Observed ground motion at a site with distance from an earthquake can be described by the ground-motion attenuation relationship (spatial). Combining the Gutenberg-Richter and ground-motion attenuation relationships results in a relationship between ground motion with an uncertainty at a site of interest and recurrence interval; i.e., a seismic hazard curve. In comparison with probabilistic seismic hazard analysis (PSHA), a widely used method for seismic hazard and risk analyses, seismic hazard derived directly from the scaling laws has a clear physical and statistical meaning. The seismic hazard has a similar meaning as those from the flood and wind hazard analyses and can be used in a similar way for risk analysis.
DE: 4475 Scaling: spatial and temporal (1872, 3270, 4277)
DE: 6309 Decision making under uncertainty
DE: 7212 Earthquake ground motions and engineering seismology
SC: Nonlinear Geophysics [NG]
MN: 2007 Fall Meeting