HR: 1400h
AN: S23A-04    [Abstracts]
TI: Utah's Regional/Urban ANSS Seismic Network---Strategies and Tools for Quality Performance
AU: * Burlacu, R
EM: burlacu@seis.utah.edu
AF: University of Utah Seismograph Stations, 135 South 1460 East Room 705 WBB, Salt Lake City, UT 84112, United States
AU: Arabasz, W J
AF: University of Utah Seismograph Stations, 135 South 1460 East Room 705 WBB, Salt Lake City, UT 84112, United States
AU: Pankow, K L
AF: University of Utah Seismograph Stations, 135 South 1460 East Room 705 WBB, Salt Lake City, UT 84112, United States
AU: Pechmann, J C
AF: University of Utah Seismograph Stations, 135 South 1460 East Room 705 WBB, Salt Lake City, UT 84112, United States
AU: Drobeck, D L
AF: University of Utah Seismograph Stations, 135 South 1460 East Room 705 WBB, Salt Lake City, UT 84112, United States
AU: Moeinvaziri, A
AF: University of Utah Seismograph Stations, 135 South 1460 East Room 705 WBB, Salt Lake City, UT 84112, United States
AU: Roberson, P M
AF: University of Utah Seismograph Stations, 135 South 1460 East Room 705 WBB, Salt Lake City, UT 84112, United States
AU: Rusho, J A
AF: University of Utah Seismograph Stations, 135 South 1460 East Room 705 WBB, Salt Lake City, UT 84112, United States
AB: The University of Utah's regional/urban seismic network (224 stations recorded: 39 broadband, 87 strong-motion, 98 short-period) has become a model for locally implementing the Advanced National Seismic System (ANSS) because of successes in integrating weak- and strong-motion recording and in developing an effective real-time earthquake information system. Early achievements included implementing ShakeMap, ShakeCast, point-to- multipoint digital telemetry, and an Earthworm Oracle database, as well as in-situ calibration of all broadband and strong-motion stations and submission of all data and metadata into the IRIS DMC. Regarding quality performance, our experience as a medium-size regional network affirms the fundamental importance of basics such as the following: for data acquisition, deliberate attention to high-quality field installations, signal quality, and computer operations; for operational efficiency, a consistent focus on professional project management and human resources; and for customer service, healthy partnerships---including constant interactions with emergency managers, engineers, public policy-makers, and other stakeholders as part of an effective state earthquake program. (Operational cost efficiencies almost invariably involve trade-offs between personnel costs and the quality of hardware and software.) Software tools that we currently rely on for quality performance include those developed by UUSS (e.g., SAC and shell scripts for estimating local magnitudes) and software developed by other organizations such as: USGS (Earthworm), University of Washington (interactive analysis software), ISTI (SeisNetWatch), and IRIS (PDCC, BUD tools). Although there are many pieces, there is little integration. One of the main challenges we face is the availability of a complete and coherent set of tools for automatic and post-processing to assist in achieving the goals/requirements set forth by ANSS. Taking our own network---and ANSS---to the next level will require standardized, well-designed, and supported software. Other advances in seismic network performance will come from diversified instrumentation. We have recently shown the utility of incorporating strong-motion data (even from soil sites) into the routine analysis of local seismicity, and have also collocated an acoustic array with a broadband seismic station (in collaboration with Southern Methodist University). For the latter experiment, the purpose of collocated seismic and infrasound sensors is to (1) further an understanding of the physics associated with the generation and the propagation of seismic and low-frequency acoustic energy from shallow sources and (2) explore the potential for blast discrimination and improved source location using seismic and infrasonic data in a synergetic way.
DE: 7294 Seismic instruments and networks (0935, 3025)
SC: Seismology [S]
MN: 2007 Joint Assembly