HR: 09:00h
AN: OS21A-04    [PDF]
TI: Tsunami Inundation Mapping for the State of California
AU: * Borrero, J C
EM: jborrero@usc.edu
AF: University of Southern California, Dept. of Civil Engineering 3620 S. Vermont Ave, KAP210, Los Angeles, CA 90089-2531 United States
AU: Synolakis, C E
EM: costas@usc.edu
AF: University of Southern California, Dept. of Civil Engineering 3620 S. Vermont Ave, KAP210, Los Angeles, CA 90089-2531 United States
AU: Eisner, R K
EM: rich_eisner@oes.ca.gov
AF: Governor's Office Of Emergency Services, 724 Mandana Boulevard, Oakland, CA 94610-2421 United States
AB: Since the International Tsunami Symposium held in Seattle, Washington in August 2001, significant progress has been made in tsunami inundation mapping for the state of California. While the mapping effort continues to focus on creating a \lq\lq worst case scenario" for use by emergency management in evacuation planning and guidance, the modeling technologies being developed will be instrumental in creating a future generation of tsunami hazard prediction that include probabilities of occurrence. Significant progress over the last two years has been achieved with the completion of a uniform, 3 arcsec combined bathymetry and topography data set that extends from San Diego County to north of San Francisco Bay. This data set also includes a 1 sec resolution grid over the San Francisco Bay region. Over the last two years, the inundation mapping program has continued to focus on near--shore tsunamis sources. These include submarine mass movements, offshore thrust faulting and complex ruptures on near--shore strike slip faults. Sources recently modeled include the Palos Verdes debirs avalanche, the Catalina Island restraining bend, the Lasuen Knoll uplift structure and the San Mateo Thrust Fault. These sources in particular that showed a significant time lag for a variety of near--shore sources for first wave arrival in to the Ports of Los Angeles and Long Beach. Numerical modeling has confirmed that this lag can be more than 20 minutes, leaving room for the possibility of a local tsunami warning system - something previously assumed to be of little use due to the proximity of the tsunami generation sources to the Ports. Thus far the inundation mapping program has completed inundation maps for Los Angeles, Santa Barbara, and San Diego Counties. As well as the Pacific side of San Francisco and the Monterey Bay area. Final maps for Ventura, Orange and San Luis Obispo county will be completed by year's end with the remainder of the state to be mapped in the coming year. Other projects being undertaken in this effort include examining sources within San Francisco Bay to investigate the tsunami hazard for marine oil transfer terminals located inside the Bay.
UR: http://www.usc.edu/dept/tsunamis
DE: 3000 MARINE GEOLOGY AND GEOPHYSICS
DE: 4564 Tsunamis and storm surges
DE: 4599 General or miscellaneous
DE: 7212 Earthquake ground motions and engineering
DE: 7223 Seismic hazard assessment and prediction
SC: Ocean Sciences [OS]
MN: 2003 Fall Meeting