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Room: 208C

Date: 4/18/2023

Session Time: 10:00 AM to 3:15 PM (local time)

From Sensors and Networks to Site Characterization and Site Response: Coming Full Circle
Recent advances in the fields of site characterization and seismic instrumentation (in terms of sensors and analysis) have introduced a wide range of new approaches that improve our ability to model the influence of near-surface soil and rock formations on ground motion. However, these new approaches are associated with challenges with how to best use and interpret these data. Decisions affecting the quality and quantity of useful ground motion data, encompassing the sensors on which they were recorded, data processing methods, and the choice of site characterization methods at various scales, all affect the accuracy of and uncertainty in the determination of seismic site parameters. These parameters describe the geometry and distribution of earth materials and their properties and are used to predict the “site effect” component of ground motion models used in seismic hazard assessment. Often, however, these downstream applications take for granted the provenance and quality of recorded waveform data and their derivatives, be they earthquake ground motions from seismic networks or site parameters derived from geophysical field campaigns. Our session aims to explore how variation in these operational and analytical decisions affects the modeling of seismic site conditions, site response and ground motion modeling and their uncertainties. We welcome presentations on each stage of ground motion data collection and analysis, from acquisition to analysis, including: recording stations, fieldwork, regional and temporary deployments, assessment of material properties and earth structure, choice of methodologies for carrying out site response analyses and the relationship between uncertainty in site characterization and site response. We encourage submissions from across the globe and at various geospatial scales, especially those pertaining to Puerto Rico and the greater Caribbean/Latin America regions.

Conveners
Lisa S. Schleicher, U.S. Geological Survey, Earthquake Science Center (lschleicher@usgs.gov)
Sean Ahdi, U.S. Geological Survey, Geologic Hazards Science Center (sahdi@usgs.gov)
Olga-Joan Ktenidou, National Observatory of Athens (olga.ktenidou@noa.gr)
Albert Kottke, Pacific Gas & Electric, Co. (arkk@pge.com)

Oral Presentations