Abstract
The Earth Physics Branch of the Department of Energy, Mines and Resources operates a variety of seismological installations throughout Canada including nineteen Standard and fourteen Regional Stations. At Yellowknife there is an 18-element short-period medium-aperture array with on-site processing which produces a daily detection bulletin. At Ottawa and Victoria, regional telemetered networks have been established which employ wide dynamic range digital data transmission and on-line event detectors. A six-element transportable array employing FM telemetry in the UHF band is used for local seismicity studies. Microprocessor-controlled event-triggered casette recorders are being developed as a further aid to regional seismicity studies. On the West Coast the Branch operates a strong-motion network that includes 28 accelerometers. At Ottawa, the data management group controls the flow of data and arranges for the distribution of seismograms, tape recordings, phase data and other derived information to Branch seismologists and other outside agencies.
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