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TitleThe Yellowknife Seismological Array
AuthorManchee, E B; Somers, H
SourcePublications of the Dominion Observatory vol. 32, no. 2, 1966, 16 pages, (Open Access)
PublisherCanada Department of Mines and Technical Surveys
Mediapaper; on-line; digital
File formatpdf
ProvinceNorthwest Territories
Subjectsgeophysics; array seismology; earthquakes; nuclear explosions, undergrd; seismic interpretations; detection; seismometers; digital data; data processing; nuclear weapons; teleseismic surveys; nuclear test-ban agreements
Illustrationslocation maps; schematic diagrams; graphs; seismograms
Released1966 01 01; 2018 10 09
AbstractThe United Kingdom Atomic Energy Authority, in cooperation with the Department of Mines and Technical Surveys of Canada, has established a large seismological array at Yellowknife, Northwest Territories. The purpose of the array is to investigate the possibility that teleseismic detection and identification of underground nuclear tests anywhere in the world may be possible using a relatively small number of similar stations. The Yellowknife Array is a research and development facility, not an operational monitoring station.
Nineteen evenly spaced seismometer vaults are arranged in an asymmetrical cross, each arm of the cross being 22.5 km in length. The output of the single vertical Willmore Mark II seismometer in each vault is recorded on a separate track on magnetic tape. The large size of the array makes azimuth searching and velocity filtering desirable and necessary in the processing of the data. The Department of Mines and Technical Surveys is in the process of acquiring digital computing facilities which will allow the magnetic tapes to be searched for all events at twice real time speeds. In addition to the identification problem, many routine seismological problems may also be investigated by use of this new and powerful tool.