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The Applied Technology Council (ATC) is pleased to announce the scheduling of the 2nd ATC-35 Workshop on National Earthquake Ground-Motion Mapping for Thursday and Friday, May 10-11, 2001, in San Francisco at the Radisson Miyako Hotel. The Workshop is being convened by ATC and the U.S. Geological Survey (USGS). Like the first ATC-35 National Earthquake Ground Motion Mapping Workshop held in Los Angeles in 1995, this Workshop will provide input from the structural engineering, geosciences, and geotechnical engineering professions to the USGS on several key issues that affect the preparation and use of the second round of national earthquake ground-motion maps. The Workshop will also provide input for USGS on new map-related products desired by map users.
The following topics will be the focus of the Workshop:
- Scientific Issues: Near-fault directivity effects; time-dependent earthquake probabilities; ground motion attenuation relationships; uncertainty.
- Issues for Design Maps: Frequency of updating maps; degree of detail in maps; deterministic bounds; role of USGS.
- Map Products and New Directions: Current and planned map products; new directions in mapping.
In addition, Workshop participants will have the opportunity to review and provide input to the USGS on preliminary plans for changes to seismic source models in locations such as the Pacific Northwest and the New Madrid seismic zone.