|Title||Recent improvements to strong motion monitoring in Canada|
|Author||Cassidy, J F;
Bent, A L|
|Source||2021 Annual Meeting, Seismological Society of America, technical sessions; Seismological Research Letters vol. 92, no. 2B, 2021 p. 1433, https://doi.org/10.1785/0220210025 Open Access|
|Alt Series||Natural Resources Canada, Contribution Series 20200700|
|Publisher||Seismological Society of America|
|Meeting||Seismological Society of America 2021 Annual Meeting; April 19-23, 2021|
|Media||paper; on-line; digital|
|Province||Canada; British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut;
|NTS||1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65;
66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560|
|Subjects||geophysics; Science and Technology; Nature and Environment; Health and Safety; seismology; strong motion seismology; seismological network; in-field instrumentation; seismic data; Canadian National
Seismograph Network; National Waveform Archive|
|Program||Public Safety Geoscience Assessing Earthquake Geohazards|
|Released||2021 04 01|
|Abstract||As of January, 2021, one of the most significant changes in strong motion monitoring in Canada since the first deployment of accelerometers in 1963, has been completed. This upgrade provides ~100 new
strong motion instruments co-located with weak-motion instruments (6-component) at Canadian National Seismograph Network (CNSN) bedrock sites with an additional ~40 sites (mostly bedrock) having stand-alone strong motion instruments. The vast
majority of these CNSN instruments are located in the high seismic hazard regions of Canada, especially Vancouver Island and southwest British Columbia, Haida Gwaii, and the St. Lawrence Valley region. Also, for the first time, strong motion
instruments are located in northern Canada.|
The Titan instruments are currently streaming data at 100 s/s and have a maximum 4 g recording level. The continuous records from the Titan sensors are available by request to the NRCan's National
Waveform Archive. To ensure high availability and resiliency, all seismic data are sent simultaneously to two data centers: one in Sidney, British Columbia and one in Ottawa, Ontario. The acquisition systems forward the data to an archive server,
where the data are saved and available to the routine processing systems.
Strong motion waveform data and station metadata are freely available via a variety of methods.
In addition to these strong motion instruments there are an additional
350+ strong motion instruments across Canada (mostly in British Columbia) owned and operated by other organisations (e.g., B C Ministry of Transportation and Highways, BC Hydro, and more). These instruments are primarily located on soil
With this recent CNSN upgrade, and the continued expansion of strong motion monitoring by other organisations across Canada, engineers will have access to more (and very valuable) strong motion data for Canadian earthquakes. This will lead
to improved earthquake hazard models, improved seismic design for infrastructure, and safer communities.
|Summary||(Plain Language Summary, not published)|
This document summarises recent updates to the Canadian National Strong Motion Network. It also summarises other Canadian strong motion monitoring
systems. These new data are of critical importance to engineers and emergency responders before, during and after an earthquake. These data will provide critical information required to update future seismic hazard models in Canada.