HR: 0800h
AN: S51A-0224    [Abstracts]
TI: ShakeMap-Based Earthquake Emergency Response for Lifelines
AU: * Nishenko, S
EM: SPN3@pge.com
AF: Pacific Gas and Electric Company, 245 Market Street, San Francisco, CA 94105, United States
AU: Eidinger, J
EM: eidinger@geengineeringsystems.com
AF: G&E Engineering Systems, 6315 Swainland Road, Oakland, CA 94611, United States
AU: McLaren, M
EM: MKM2@pge.com
AF: Pacific Gas and Electric Company, 245 Market Street, San Francisco, CA 94105, United States
AB: Pacific Gas and Electric (PG&E), Bay Area Rapid Transit (BART), Bonneville Power Administration (BPA), and a number of other lifeline operators and utilities are using Geographic Information System (GIS)-based products, including ShakeMap, to enhance their earthquake emergency response capabilities. PG&E uses ShakeMap in conjunction with improved digital hazard maps for the San Francisco Bay area as a decision support tool to prioritize response activities. Used as a screening tool, this information helps to rapidly identify potential gas and electric transmission problem areas, prior to the receipt of damage reports from the field. Earthquake Risk Values, which combine ground shaking estimates with surface fault rupture, ground failure, and pipeline performance factors, are used to identify potentially vulnerable transmission pipeline segments and gas handling facilities for inspection following an earthquake. Scenario ShakeMaps are used for emergency training exercises and, in the event a large earthquake causes the Internet to be temporarily out of service, can be used for initial damage assessments until actual ShakeMaps become available. BART integrates the ground motions developed in near real time using ShakeMap with a BART vulnerability model in a System Earthquake Risk Assessment (SERA) to establish the likely post earthquake damage to the BART system. After most M3 or larger earthquakes, the SERA model for BART is run, using the ShakeMap- developed ground motions, to assess the likely and near-lower bound performance for more than 15,000 individual structures and components in the BART system. If any of these structures or components are predicted to have greater than a 10% chance of material nonlinear performance that might invoke a life safety situation, BART sends out people to visually inspect the facilities so targeted by the analysis. This software has been used to analyze the BART system for 15 earthquakes (M3.5 to M4.4) using ShakeMaps since 2003; only the July 20, 2007 earthquake along the Hayward fault triggered the need for visual inspections. BPA uses SERA to rapidly evaluate the potential for damage at its high voltage substations throughout the Pacific Northwest. The BPA model includes many thousands of pieces of equipment at BPA's 115 kV, 230 kV and 500 kV substations. As BPA's service area is so large, the ShakeMap analysis helps identify where the likely damage might have occurred within BPA's system, and helps establish the likely extent of substation damage and thus the magnitude of the needed emergency response. This software has been used to analyze the BPA system for 8 earthquakes (M2.7 to M4.0) using ShakeMaps since 2004; none has yet triggered the need to perform post- earthquake visual inspections.
DE: 7212 Earthquake ground motions and engineering seismology
SC: Seismology [S]
MN: 2007 Fall Meeting