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TitleThe Yellowknife seismic array: comparative study between the 2013 upgrade and its 1989 predecessor
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorEdwards, W N
SourceGeological Survey of Canada, Open File 7559, 2014, 39 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
File formatpdf
ProvinceNorthwest Territories
Lat/Long WENS-115.0000 -114.5000 62.5000 62.2500
Subjectsgeophysics; seismic interpretations; seismicity; seismic data; seismology; seismological network; seismic arrays; nuclear explosions; array seismology
Illustrationslocation maps; photographs; profiles; plots; tables; schematic diagrams
ProgramCanadian Hazard Information Service
Released2014 04 09
AbstractThe Yellowknife Seismic Array (YKA) has been an active part of Canada's contribution to nuclear explosion monitoring for more than 50 years. Near continuous seismic monitoring of the globe has occurred at YKA for the telltale signs of nuclear explosion testing since its inception in 1962, resulting in thousands of tests being identified. To achieve such a track record, the array has undergone several upgrades to its technology and infrastructure to meet the demands of the time. After nearly 25 years of service since its switch from analog to digital recording, YKA has again undergone a significant recapitalization of its infrastructure to modern standards of digital seismic monitoring to meet the demands of its mandate as the primary array station PS09 in the International Monitoring System and Canada's commitment and obligations under the Comprehensive Nuclear-Test-Ban Treaty. This report documents many of the changes made to the array during the upgrade through a data comparison by both the upgraded YKA and its predecessor collected simultaneously during the latter half of 2013. The comparison verifies the data quality of the new array, its readiness for inclusion into full operational status, and outlines recommendations for minor improvements prior to its recertification and the decommissioning of the former YKA.
Summary(Plain Language Summary, not published)
Collocated data collected from both the new and old Yellowknife Seismic Arrays (YKA) is analysed to measure a data quality, aspects of new infrastructure that might affect data quality. As well, changes are documented and a comparative analysis is made between the two systems to evaluate the new systems' ability to replace its predecessor. Recomendations are given to fix minor technical issues, but overall assessment is that the new YKA is capable of replacing its predecessor so that that it may be decommissioned.

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