| Title | Canada's automated earthquake notification service |
| Download | Downloads |
| Author | Wetmiller, R J; Adams, J; Woodgold, C |
| Source | Proceedings of the CDA 2007 Annual Conference
/Comptes rendus du Congrès annuel 2007 de l'ACB; 2007, 13 pages, https://doi.org/10.4095/226351 |
| Year | 2007 |
| Alt Series | Earth Sciences Sector, Contribution Series 20080640 |
| Alt Series | Earth Sciences Sector, General Information Product 64 |
| Meeting | CDA 2007 Annual Conference / Congrès annuel 2007 de l'ACB; St. John's; CA; September 22-27, 2007 |
| Document | book |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | 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 |
| Lat/Long WENS | -141.0000 -50.0000 90.0000 41.7500 |
| Subjects | geophysics; seismological network; seismographs; seismology; seismicity; seismic interpretations; seismic risk; earthquakes; earthquake damage; earthquake risk; earthquake studies; earthquake damage;
dams |
| Illustrations | location maps; tables; photographs; graphs |
| |
| Abstract | The Geological Survey of Canada (GSC) provides automatic notification of significant earthquakes to agencies who need to respond rapidly. Currently dam operators in Ontario, New Brunswick and Quebec use
this service ("ANHAS") to prioritize and set the level of dam inspection. GSC uses its own 120-seismograph network plus data from another 90 seismographs in Canada and the U.S. Automatic earthquake location software (AUTOLOC) provides magnitude and
location estimates, usually within 5-10 minutes of an earthquake, and GSC uses three independent sources of real-time AUTOLOC information for reliability. The notifications contain the basic earthquake information as well as response actions
predefined for each client's facility and are transmitted by a variety of secure telecommunication means. Most dam operators now use response schemes based on ad hoc combinations of earthquake magnitude and its distance from each facility. Such
schemes are not optimal, and have inherent flaws. A more reliable way would be to (i) estimate the peak ground acceleration at each site using the ground motion relations of the National Building Code, (ii) classify the shaking level (e.g. Negligible
<1.25, Minimal 1.25-2.5, Weak 2.5-5, Moderate 5-10, and Strong >10%g), and (iii) base the response on the shaking classification level and the dam category. GSC encourages the development of such a national best-practice earthquake response scheme
for Canadian dam operators. |
| GEOSCAN ID | 226351 |
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