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canada_2005_intro [2015/01/12 12:01]
rgee
canada_2005_intro [2016/10/07 12:15] (current)
Armando Scarpati [The Seismic Source Model]
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 The 2005 Canada national seismic hazard model is described in detail by [[canada_2005_intro#​References |Adams and Halchuck (2003)]] and [[canada_2005_intro#​References |Halchuck and Adams (2008)]]. We report here a description of the OpenQuake-engine implementation of the model. The 2005 Canada national seismic hazard model is described in detail by [[canada_2005_intro#​References |Adams and Halchuck (2003)]] and [[canada_2005_intro#​References |Halchuck and Adams (2008)]]. We report here a description of the OpenQuake-engine implementation of the model.
 ===== The Seismic Source Model ===== ===== The Seismic Source Model =====
-To capture epistemic uncertainties in the seismic ​source definitontwo complete seismic source +The full probabilistic ​seismic ​hazard model is intended to be used as a "​robust"​ modelone in which the hazard at each site is taken as the greatest value of the ground motions defined by several different models. These models are:\\ 
-models are definedthe historical ​(H) and regional (R) models. The historical model uses +  * The **Historical** Model (H): Uses relatively small source zones drawn around historical seismicity clusters\\ 
-relatively small source zones drawn around historical seismicity clusters, while the regional +  * The **Regional** Model (R): Uses larger ​uniform ​regional zonesreflecting ​the wider seismotectonic units\\ 
-model defines ​largerregional zones reflecting seismotectonic units. Both models are composed +  * The **Cascadia (Deterministic)** Model (C): A deterministic model based on the expected ground motions from a M<​sub>​W</​sub>​ 8.2 earthquake on the Cascadia subduction interface. Due to the expected probabilities of recurrence of such an event (typically on the order of 400 to 600 years), the median ground motion from the scenario earthquake is assumed approximately equivalent to the 5 % probability of exceedance in 50 years, whilst the median plus 1 standard deviation is assumed notionall equivalent to the 2 % probability of exceedance in 50 years.\\ 
-of area sources, with the only exception of the Queen Charlotte fault (in western Canada) +  * The **Stable Floor** Model (F): A simple area source model intended to represent the lowest level of ground motion hazard for the stable intraplate regions of Canada. \\ 
-treated as a fault source. ​The model also prescribes a floor model (F) for the relatively + 
-aseismic central part of Canada and a deterministic ​model for the Cascadia subdution zone (C). +The H and R models are themselves separated into two different models: East (covering the Eastern and Central Canada) and West (covering Western Canada and the Rocky Mountains). The "​robust"​ model for each site is therefore constructed by taking, for each ground motion intensity measure, the maximum of the four (H, R, C and F) models within each of the two (Eastern and Western) regions. To ensure continuity at the frontier between East and West, the larger of the two respective models is preferred at the site. Both the **Historical** and **Regional** ​models are composed of area sources, with the only exception of the Queen Charlotte fault (in western Canada) 
-Currently, only the H and R models ​are implemented ​in the OpenQuake-engine.+treated as a fault source. 
 + 
 +A more complete implementation of the stable ​floor model is currently in preparation,​ but in the meantime users of the model are advised to use those values of the stable floor model provivided by Geological Survey of Canada ​(Table 4 of OF4459): 
 + 
 +All values ​are reported ​in (g) 
 +^   ^ PGA ^ Sa (0.1) ^ Sa (0.15) ^ Sa (0.2) ^ Sa (0.3) ^ Sa (0.4) ^ Sa(0.5) ^ Sa (1.0) ^ Sa (2.0) ^   
 +| 2 % PoE in 50 years | 0.059 | 0.087 | 0.110 | 0.120 | 0.082 | 0.064 | 0.056 | 0.023 | 0.006 | 
 +|10 % PoE in 50 years | 0.021 | 0.031 | 0.040 | 0.044 | 0.033 | 0.024 | 0.024 | 0.009 | 0.002 |
  
 Earthquake ruptures associated with area sources are assumed to have no spatial extension (that Earthquake ruptures associated with area sources are assumed to have no spatial extension (that
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 The map below depicts the annual occurrence rate per source (between minimum and maximum magnitudes) for the historical and regional models. Click the //show map layers// icon to view the different source models and base layer maps. The map below depicts the annual occurrence rate per source (between minimum and maximum magnitudes) for the historical and regional models. Click the //show map layers// icon to view the different source models and base layer maps.
  
-<olmap id="​olmap"​ width="​900px"​ height="​500px"​ lat="​65.0"​ lon="​-100."​ zoom="​3"​ statusbar="​1"​ toolbar="​1"​ controls="​1"​ poihoverstyle="​0"​ baselyr="​mapquest road" gpxfile=""​ kmlfile=""​ geojsonfile="">​+<olmap id="​olmap"​ width="​900px"​ height="​500px"​ lat="​65.0"​ lon="​-100."​ zoom="​3"​ statusbar="​1"​ toolbar="​1"​ controls="​1"​ poihoverstyle="​0"​ baselyr="​osm" gpxfile=""​ kmlfile=""​ geojsonfile="">​
 </​olmap>​ </​olmap>​
-<​olmap_osmlayer id="​olmap"​ name="​Canada 2005 Historical"​ url="​http://​tilestream.openquake.org/​v2/​Canada_GSC2005_historical/​${z}/​${x}/​${y}.png"​ visible="​true"​ attribution="​Canada 2005 Historical"></​olmap_osmlayer>​ + 
-<​olmap_osmlayer id="​olmap"​ name="​Canada 2005 Regional"​ url="​http://​tilestream.openquake.org/​v2/​Canada_GSC2005_regional/​${z}/​${x}/​${y}.png"​ visible="​true"​ attribution="​Canada 2005 Regional"></​olmap_osmlayer>​+<​olmap_osmlayer id="​olmap"​ name="​EAST-Historical - SCC_area"​ url="​http://​tilestream.openquake.org/​v2/​hazard_CAN10-EASTH_input_scc_area/​${z}/​${x}/​${y}.png"​ visible="​true"​ attribution="​Canada 2005 Historical"></​olmap_osmlayer>​ 
 + 
 +<​olmap_osmlayer id="​olmap"​ name="​EAST-Regional - SCC_area" url="​http://​tilestream.openquake.org/​v2/​hazard_CAN10-EASTR_input_scc_area/​${z}/​${x}/​${y}.png"​ visible="​true"​ attribution="​Canada 2005 Historical"></​olmap_osmlayer>​ 
 + 
 +<​olmap_osmlayer id="​olmap"​ name="​WEST-Historical - ASC_area"​ url="​http://​tilestream.openquake.org/​v2/​hazard_CAN10-WESTH_input_asc_area/​${z}/​${x}/​${y}.png"​ visible="​true"​ attribution="​Canada 2005 Historical"></​olmap_osmlayer>​ 
 + 
 +<​olmap_osmlayer id="​olmap"​ name="​WEST-Historical - ASC_fault"​ url="​http://​tilestream.openquake.org/​v2/​hazard_CAN10-WESTH_input_asc_simplefault/​${z}/​${x}/​${y}.png"​ visible="​true"​ attribution="​Canada 2005 Historical"></​olmap_osmlayer>​ 
 + 
 +<​olmap_osmlayer id="​olmap"​ name="​WEST-Historical - SubIntraSlab_area"​ url="​http://​tilestream.openquake.org/​v2/​hazard_CAN10-WESTH_input_subintraslab_area/​${z}/​${x}/​${y}.png"​ visible="​true"​ attribution="​Canada 2005 Historical"></​olmap_osmlayer>​ 
 + 
 +<​olmap_osmlayer id="​olmap"​ name="​WEST-Regional ​- ASC_area" url="​http://​tilestream.openquake.org/​v2/​hazard_CAN10-WESTR_input_asc_area/​${z}/​${x}/​${y}.png"​ visible="​true"​ attribution="​Canada 2005 Historical"></​olmap_osmlayer>​ 
 + 
 +<​olmap_osmlayer id="​olmap"​ name="​WEST-Regional ​- ASC_fault"​ url="​http://​tilestream.openquake.org/​v2/​hazard_CAN10-WESTR_input_asc_simplefault/​${z}/​${x}/​${y}.png"​ visible="​true"​ attribution="​Canada 2005 Historical"></​olmap_osmlayer>​ 
 + 
 +<​olmap_osmlayer id="​olmap"​ name="​WEST-Regional - SubIntraSlab_area"​ url="​http://​tilestream.openquake.org/​v2/​hazard_CAN10-WESTR_input_subintraslab_area/​${z}/​${x}/​${y}.png"​ visible="​true"​ attribution="​Canada 2005 Historical"></​olmap_osmlayer>​ 
 <​html>​ <​html>​
 <div class='​my-legend'>​ <div class='​my-legend'>​
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 | 5.2.6      | Ground motion fields ​                                                                                                                            | Not available ​                                                                                                                                                           | | 5.2.6      | Ground motion fields ​                                                                                                                            | Not available ​                                                                                                                                                           |
 | //​Notes// ​ | Results can be accessed interactively from the hazard section of the Earthquakes Canada [[http://​earthquakescanada.nrcan.gc.ca/​hazard|website]] ​                                                                                                                                                                           || | //​Notes// ​ | Results can be accessed interactively from the hazard section of the Earthquakes Canada [[http://​earthquakescanada.nrcan.gc.ca/​hazard|website]] ​                                                                                                                                                                           ||
-|                                                                                                                                                                                                                                                                                                                                                       ||| +
-^ 6          ^ Download oq-engine input model (NRML format) - Please read the license and disclaimer attached to the model                                                                                                                                                                                                                                           || +
-| //​Link// ​  | Not available ​                                                                                                                                   ||       +
  
  
 ===== Download The OpenQuake-engine Input Model ===== ===== Download The OpenQuake-engine Input Model =====
  
-The OpenQuake-engine input model (NRML format) can be downloaded at the link provided below - Please read the license and disclaimer attached to the model. ​                                                                                                                                                                                                                                         ​+The OpenQuake-engine input model (NRML format) can be downloaded at the link provided below - Please read the license and disclaimer attached to the model. 
 + 
 +<color red/​white>​ N.B. This is a model adapted by GEM Hazard team to the OpenQuake-engine from the original model developed by the Geological Survey of Canada. This explains minor differences you might encounter between the results presented in the OpenQuake platform and those disseminated by the original Organisation. </​color> ​                                                                                                                                                                                                                                         
  
-link | Download]]+The model will be available in the first semester of 2015.
  
  
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