Framework for incorporating site characteristic information at Advanced National Seismic System sites into the Center for Engineering Strong Motion Data
Description:
Knowledge of the near-surface characteristics at seismic stations improves our ability to separate the sources of energy in seismic records into contributions from the earthquake source, the path and ground-motion attenuation, and the local site response. Our recent compilation of geologic and seismic velocity characteristics at Advanced National Seismic System (ANSS) strong motion accelerometer sites aggregates measurements of shear-wave velocity (VS) characteristics in the upper 30 m (VS30), three different VS30 proxies (based on geology, terrain, and a hybrid approach), VS profile data from compilations, statistics on VS30 uncertainty, and preferred values determined from site databases of large-scale ground motion model development efforts (i.e. most recent regional Next Generation Attenuation [NGA] Model projects). The motivation for this effort is to make the contents of this compilation more easily accessible on station information pages and webservices at the Center for Engineering Strong Motion Datacenter (CESMD). Our framework incorporates the preferred VS30 value identified either by the local regional seismic network (RSN) or the most recent regional NGA projects and highlights when new measured shear-wave velocity information is available in the ANSS compilation. For stations that have not been used by an NGA project or where a preferred VS30 values has been identified by the RSN, we display the geometric mean of available VS30 measurements or the three proxy-based VS30 values. We also link to the VS data profile database at vspdb.org. We encourage users to consider the VS30 values at CESMD as a summarized resource and to consult the full contents of the ANSS compilation for greater detail on the site characterization information. Our most recent effort includes adding the maximum recorded peak ground acceleration and number of records at each station to facilitate planning and prioritization for making new field measurements.
Session: From Sensors and Networks to Site Characterization and Site Response: Coming Full Circle [Poster]
Type: Poster
Date: 4/18/2023
Presentation Time: 08:00 AM (local time)
Presenting Author: Lisa S. Schleicher
Student Presenter: No
Invited Presentation:
Authors
Lisa Schleicher Presenting Author Corresponding Author lschleicher@usgs.gov U.S. Geological Survey |
Garet Huddleston garet.huddleston@cwu.edu Central Washington University |
Sean Ahdi sahdi@usgs.gov U.S. Geological Survey |
Jamison Steidl steidl@ucsb.edu University of California |
Lijam Hagos lblair@usgs.gov California Geological Survey |
James Luke Blair lblair@usgs.gov U.S. Geological Survey |
Eric Thompson emthompson@usgs.gov U.S. Geological Survey |
Hamid Haddadi hamid.haddadi@conservation.ca.gov California Geological Survey |
Lind Gee lgee@usgs.gov U.S. Geological Survey |
Framework for incorporating site characteristic information at Advanced National Seismic System sites into the Center for Engineering Strong Motion Data
Category
From Sensors and Networks to Site Characterization and Site Response: Coming Full Circle