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![(A) Hazard curves computed by the OpenQuake engine (Pagani et al., 2014) for the location of GV2 are shown. The lower (dotted line), central (solid line), and upper (dashed line) curves are plotted for each ground-motion model (GMM) as well as the weighted mean hazard curve (yellow line). Each hazard curve is produced by the “true mean” UCERF3 source characterization with each GMM branch of the ground-motion characterization logic tree (Field et al., 2013; Rao et al., 2017). The spread between the upper and lower backbone hazard curves for each GMM represents the epistemic uncertainty in the ground motions estimated by that GMM. (B) The hazard curves for the location of GV2 (the same curves as in A) are colored by whether they pass the PBR validation, i.e., the ground-motion estimates are consistent with a 5% probability of survival of GV2, or fail the PBR validation, i.e., the ground-motion estimates are inconsistent with a 5% probability of survival of GV2. Equivalent color figures of the other PBRs studied are provided in Figure S1 (see text footnote 1).]()
![Equivalent logic tree as implemented into the OpenQuake-engine that uses the weighted average of occurrence rates for the collapsed a- and b-value couples, and Mmax branches.]()
![Correlation between index and OpenQuake losses for a concentrated network for method 1 (top) versus method 3C (bottom).]()
![Framework for integrated risk assessment in OpenQuake. Adapted from Cutter (1996), Cutter et al. (2000).]()
![Calculated hazard curves using the Cascadia interface source only (Rogers et al., 2015) with a 125 km down-dip rupture width. The respective curves compare hazard as calculated using GSCFRISK (Halchuk et al., 2016) and calculations in the OpenQuake-engine using the scaling relationships of Wells and Coppersmith (1994), Strasser et al. (2010) interface, Allen and Hayes (2017) bi-linear interface, and the NRCan-specific scaling relationship (GSC Cascadia) as implemented in the OpenQuake-engine (Equations 1 and 2). The NRCan-specific relationship implemented in the OpenQuake-engine provides the best approximation to the GSCFRISK results for near-source sites at lower probabilities of exceedance (e.g. Tofino, BC). The dashed horizontal line represents an annual probability of exceedance of 0.000404, or a 2% probability of exceedance in 50 years used in NBCC.]()
![Mean hazard map for PGA with 10% probability of exceedance (PoE) in 50 years obtained using the OpenQuake implementation of the Nath and Thingbaijam (2012) model (“A2019”).]()
![Logic tree and associated weights used for the 2015 Fifth Generation model as implemented in GSCFRISK for the 2015 NBCC. The red box indicates the MFD branches that were collapsed to a single branch for implementation into the OpenQuake-engine.]()
![Hazard curves for spectral acceleration (0.10 s) obtained for the various source zones and GMPE combinations using FRISK88 (solid curves) and OpenQuake‐engine (dashed curves); see caption of Figure 3.]()
![Hazard curves obtained for the host ECC source using FRISK88 (solid curves) and OpenQuake‐engine (dashed curves) for different combinations of GMPE and response period as indicated in the legend (see Fig. 3 caption for details).]()
![Verification test hazard curves. Dashed lines are hazard curves produced in the traditional manner (using the OpenQuake Engine), and solid lines are calculated using the method described in this article. Thick inner lines are mean hazard from the weighted logic tree, and thin outer lines are 10% and 90% quantiles. The color version of this figure is available only in the electronic edition.]()
![Disaggregation at a site in Ankara (coordinates of (39.96oN, 32.84oE)) at low (left) and high (right) IM levels for SAT at T = 1.82 s based on area source model of SHARE (Giardini et al., 2013) using OpenQuake (Pagani et al., 2014).]()
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![Comparison of ground-motion attenuation curves interpolated from the Atkinson and Adams (2013) ground-motion tables for shallow active crust using GSCFRISK and the OpenQuake-engine ground-motion interpolators. Comparisons are shown for a moment magnitude MW 7.15 earthquake for spectral accelerations at (a) Sa(0.2 s) and (b) Sa(1.0 s).]()
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1-20 OF 236 RESULTS FOR
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Journal Article
Forensic PSHA: Benchmarking Canada’s Fifth Generation seismic hazard model using the OpenQuake-engine
Journal: Earthquake Spectra
Publisher: Earthquake Engineering Research Institute
Published: 01 October 2020
Earthquake Spectra (2020) 36 (1_suppl): 91–111.
...Trevor I Allen; Stephen Halchuk; John Adams; Graeme A Weatherill This article explores the implementation of the Natural Resources Canada’s Fifth Generation national seismic hazard model as developed for the National Building Code of Canada (NBCC), within the OpenQuake-engine. It also describes...
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Journal Article
OpenQuake Implementation of the Canterbury Seismic Hazard Model
Journal: Seismological Research Letters
Publisher: Seismological Society of America
Published: 28 August 2019
Seismological Research Letters (2019) 90 (6): 2227–2235.
...Chris Van Houtte; Elizabeth Abbott ABSTRACT This article describes the release of the GNS Science Canterbury Seismic Hazard Model (CSHM), as implemented in the Global Earthquake Model’s OpenQuake software. Time‐varying models are implemented for the 50 yr time period between 2014 and 2064, as well...
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Journal Article
Assessing Integrated Earthquake Risk in OpenQuake with an Application to Mainland Portugal
Journal: Earthquake Spectra
Publisher: Earthquake Engineering Research Institute
Published: 01 August 2016
Earthquake Spectra (2016) 32 (3): 1383–1403.
... that will be utilized for end-to-end earthquake risk assessment within the Global Earthquake Model's (GEM) OpenQuake framework ( Burton and Silva 2014 ). Due to its location near the boundary between the African, Eurasian, and North American plates, Portugal is exposed to large-magnitude offshore earthquakes...
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Journal Article
Modeling Distributed Seismicity for Probabilistic Seismic‐Hazard Analysis: Implementation and Insights with the OpenQuake Engine
Publisher: Seismological Society of America
Published: 17 June 2014
Bulletin of the Seismological Society of America (2014) 104 (4): 1636–1649.
... the OpenQuake (OQ) engine, the open‐source software for seismic hazard and risk assessment promoted by the Global Earthquake Model initiative. For a simple test case we show how the inclusion of rupture finiteness, with respect to the point‐rupture approximation, leads to a significant increase...
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Journal Article
OpenQuake Engine: An Open Hazard (and Risk) Software for the Global Earthquake Model
Journal: Seismological Research Letters
Publisher: Seismological Society of America
Published: 01 May 2014
Seismological Research Letters (2014) 85 (3): 692–702.
... for the calculations. The fundamental motivations that inspired the creation of the OpenQuake Engine, the hazard and risk software developed by GEM (hereinafter OQ‐engine), are those of reproducibility, testing, and community‐based development process. Reproducibility, one of the central tenets of the scientific...
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Image
Rupture inputs required for OpenQuake earthquake rupture centered on the hy...
in Bayesian analysis of ground motion models using chimney fragility curves: 2021, 5.9-Mw Woods Point intraplate earthquake, Victoria, Australia
> Earthquake Spectra
Published: 01 February 2024
Table 3. Rupture inputs required for OpenQuake earthquake rupture centered on the hypocenter Woods Point earthquake OpenQuake inputs M W 5.9 Rake 0 Hypocenter longitude 146.402 Hypocenter latitude −37.506 Hypocenter depth 12.7 km Rupture type Simple fault
Image
(A) Hazard curves computed by the OpenQuake engine ( Pagani et al., 2014 ) ...
in Validation of earthquake ground-motion models in southern California, USA, using precariously balanced rocks
> GSA Bulletin
Published: 20 December 2022
Figure 6. (A) Hazard curves computed by the OpenQuake engine ( Pagani et al., 2014 ) for the location of GV2 are shown. The lower (dotted line), central (solid line), and upper (dashed line) curves are plotted for each ground-motion model (GMM) as well as the weighted mean hazard curve (yellow
Image
Equivalent logic tree as implemented into the OpenQuake-engine that uses th...
in Forensic PSHA: Benchmarking Canada’s Fifth Generation seismic hazard model using the OpenQuake-engine
> Earthquake Spectra
Published: 01 October 2020
Figure 4. Equivalent logic tree as implemented into the OpenQuake-engine that uses the weighted average of occurrence rates for the collapsed a - and b -value couples, and M max branches.
Image
Correlation between index and OpenQuake losses for a concentrated network f...
in Loss Predictive Power of Strong Motion Networks for Usage in Parametric Risk Transfer: Istanbul as a Case Study
> Earthquake Spectra
Published: 01 November 2017
Figure 7. Correlation between index and OpenQuake losses for a concentrated network for method 1 (top) versus method 3C (bottom).
Image
Framework for integrated risk assessment in OpenQuake. Adapted from Cutter...
in Assessing Integrated Earthquake Risk in OpenQuake with an Application to Mainland Portugal
> Earthquake Spectra
Published: 01 August 2016
Figure 1. Framework for integrated risk assessment in OpenQuake. Adapted from Cutter (1996) , Cutter et al. (2000) .
Image
Calculated hazard curves using the Cascadia interface source only ( Rogers ...
in Forensic PSHA: Benchmarking Canada’s Fifth Generation seismic hazard model using the OpenQuake-engine
> Earthquake Spectra
Published: 01 October 2020
Figure 2. Calculated hazard curves using the Cascadia interface source only ( Rogers et al., 2015 ) with a 125 km down-dip rupture width. The respective curves compare hazard as calculated using GSCFRISK ( Halchuk et al., 2016 ) and calculations in the OpenQuake-engine using the scaling
Image
Mean hazard map for PGA with 10% probability of exceedance (PoE) in 50 year...
Published: 01 October 2020
Figure 3. Mean hazard map for PGA with 10% probability of exceedance (PoE) in 50 years obtained using the OpenQuake implementation of the Nath and Thingbaijam (2012) model (“A2019”).
Image
Logic tree and associated weights used for the 2015 Fifth Generation model ...
in Forensic PSHA: Benchmarking Canada’s Fifth Generation seismic hazard model using the OpenQuake-engine
> Earthquake Spectra
Published: 01 October 2020
Figure 3. Logic tree and associated weights used for the 2015 Fifth Generation model as implemented in GSCFRISK for the 2015 NBCC. The red box indicates the MFD branches that were collapsed to a single branch for implementation into the OpenQuake-engine.
Image
Hazard curves for spectral acceleration (0.10 s) obtained for the various s...
in Quality Assurance for Logic‐Tree Implementation in Probabilistic Seismic‐Hazard Analysis for Nuclear Applications: A Practical Example
> Seismological Research Letters
Published: 01 November 2013
Figure 4. Hazard curves for spectral acceleration (0.10 s) obtained for the various source zones and GMPE combinations using FRISK88 (solid curves) and OpenQuake‐engine (dashed curves); see caption of Figure 3 .
Image
Hazard curves obtained for the host ECC source using FRISK88 (solid curve...
in Quality Assurance for Logic‐Tree Implementation in Probabilistic Seismic‐Hazard Analysis for Nuclear Applications: A Practical Example
> Seismological Research Letters
Published: 01 November 2013
Figure 5. Hazard curves obtained for the host ECC source using FRISK88 (solid curves) and OpenQuake‐engine (dashed curves) for different combinations of GMPE and response period as indicated in the legend (see Fig. 3 caption for details).
Image
Verification test hazard curves. Dashed lines are hazard curves produced in...
in Calculation of National Seismic Hazard Models with Large Logic Trees: Application to the NZ NSHM 2022
> Seismological Research Letters
Published: 01 November 2023
Figure 6. Verification test hazard curves. Dashed lines are hazard curves produced in the traditional manner (using the OpenQuake Engine), and solid lines are calculated using the method described in this article. Thick inner lines are mean hazard from the weighted logic tree, and thin outer
Image
Disaggregation at a site in Ankara (coordinates of (39.96 o N, 32.84 o E)) ...
Published: 01 November 2020
Figure 1. Disaggregation at a site in Ankara (coordinates of (39.96 o N, 32.84 o E)) at low (left) and high (right) IM levels for SAT at T = 1.82 s based on area source model of SHARE ( Giardini et al., 2013 ) using OpenQuake ( Pagani et al., 2014 ).
Journal Article
Large-scale damage assessment of buildings considering SSI and site amplification: The case of Thessaloniki
Journal: Earthquake Spectra
Publisher: Earthquake Engineering Research Institute
Published: 01 May 2024
Earthquake Spectra (2024) 40 (2): 1324–1352.
... an enhanced building exposure model, using publicly available data and the open-source OpenQuake Engine software. The objective is to determine whether a more refined approach incorporating SSI and SAmp can impact the final damage calculation. We evaluate our approach by estimating the damage distribution...
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Image
Comparison of ground-motion attenuation curves interpolated from the Atkin...
in Forensic PSHA: Benchmarking Canada’s Fifth Generation seismic hazard model using the OpenQuake-engine
> Earthquake Spectra
Published: 01 October 2020
Figure 1. Comparison of ground-motion attenuation curves interpolated from the Atkinson and Adams (2013) ground-motion tables for shallow active crust using GSCFRISK and the OpenQuake-engine ground-motion interpolators. Comparisons are shown for a moment magnitude M W 7.15 earthquake
Journal Article
Implementing Non‐Poissonian Forecasts of Distributed Seismicity into the 2022 Aotearoa New Zealand National Seismic Hazard Model
Publisher: Seismological Society of America
Published: 11 January 2024
Bulletin of the Seismological Society of America (2024) 114 (1): 244–257.
.... The impact of these forecasts in the hazard space is investigated by implementing a negative‐binomial formulation in the OpenQuake hazard software suite, which is adopted by the 2022 Aotearoa New Zealand National Seismic Hazard Model. For a 10% exceedance probability of peak ground acceleration (PGA) in 50...
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