Strong motion monitoring has undergone a revolution in Canada in recent years. Most analogue,non-communicating instruments have been replaced with modern digital instruments that provideinformation in real-time. Dense networks are being deployed in the urban
centres of southwest BritishColumbia to provide shaking parameters and "shake maps" immediately after an earthquake.Monitoring of critical infrastructure, including bridges, dam sites and transmission facilities is increasing. This article documents the current state of strong motion monitoring
across Canada, andsummarises the data sets that are currently available. As of 2008, the Geological Survey of Canada operates 110 strong motion instruments (Internet Acclerometers or IA's) across Canada, most of whichare deployed in the urban centres of high seismic hazard in southwest British
Columbia. Partnerorganisations operate an additional 70 strong motion instruments monitoring critical infrastructure inwestern Canada. In eastern Canada, the GSC operates a network of 18 strong motion instruments inthe active Charlevoix zone, and 6 IA's in greater Ottawa. Partner organisations
operate instruments atan additional 15 sites. During the past decade, more than 700three component accelerograms have been recorded across Canada. While some large ground motions have been recorded (peak groundacceleration (PGA) greater than 2g), most of the records represent weak motion (PGA less
than 5%g).These are useful for evaluating local site response, which in turn will be valuable to engineersevaluating strong ground shaking during future earthquakes.