Assessing the Nation's Earthquakes The Health and Future of Regional Seismograph Networks (1990) / Chapter Skim
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Appendix C: A Revitalization of Regional Seismic Networks: Implementation Strategies
Appendix C: A Revitalization of Regional Seismic Networks: Implementation Strategies
Pages 57-68
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From page 57... ...
Nuclear Regulatory Commission to phase out its support of regional networks in the eastern United States, and to support the establishment of a National Seismic Network by the USGS, has led to both a short-term crisis for the support of regional earthquake studies in the East and a long-term opportunity for revitalization of regional network data gathering. It is not the purpose here to make the case for the breadth of scientific or practical opportunities provided by regional networks.
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From page 58... ...
and encourages the growth of funding for research based on data from an improved and integrated national/regional network system. REGIONAL NETWORKS—CAPABILITIES AND LIMITATIONS Regional telemetered networks, of the type now in operation in many parts of the United States, were originally installed with the primary purpose of locating large numbers of small-magnitude events as a mapping tool in defining active faults and in determining modes of deformation based on fault plane solutions.
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From page 59... ...
Both the magnitude range (m 59 3) and spatial resolution necessary to observe these processes demand monitoring on a regional scale with a station density that is beyond the scope of a national network.
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From page 60... ...
Centers for regional seismic studies, with regional networks as an important component, will continue to play an important role in providing a complement to a national program to: · provide denser coverage to focus on areas of special interest (higher seismicity, significant tectonic problems, higher seismic risk, critical engineering structures) ; · act as a regional center for coordinating response to earthquakes and interaction with the public on questions of regional seismicity;
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From page 61... ...
The network design throughout involves digital signal conditioning and telemetry of broadband three-component ground motion, providing high-quality data suitable for many research applications on regional, national, and teleseismic earthquakes. The satellite telemetry systems provide a vehicle for national communication of seismic data, which has the capacity to extend well beyond the demands of the USNSN itself.
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From page 62... ...
gather data from a dense cluster and use the same USNSN satellite telemetry link back to the regional center. Regional network nodes would be capable of automatic event detection, parameter determination, hypocenter location, coordination of communication protocol, and backup recording.
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From page 63... ...
An integrated national/regional network system. National network satellite telemetry link provides telemetry of all event data and some continuous shortperiod data from regional clusters to regional centers in near real time.
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From page 64... ...
· Continue development of a plan for siting USNSN stations. Take into consideration possible sites for regional network nodes in choosing USNSN station locations.
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From page 65... ...
Accelerate the initial deployment of the USNSN by providing satellite telemetry to universities or regional networks with existing broadband stations to start experimentation with telemetry and data collection. Start with those networks that have regional node configurations to experiment with the concept of national/regional network integration.
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From page 66... ...
A Science Plan should continue to be developed that clearly identifies the unique contributions of regional networks and is aimed at those agencies that can benefit from regional studies. The Committee on Seismology's Panel on Regional Networks should prepare a realistic profile of the funding required to establish an integrated National Seismic System of national and regional networks.
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From page 67... ...
A long-term plan should be developed for continued operation of regional networks. Special emphasis should be given to means of stimulating state funding for operational support for monitoring of regional seismicity.
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