Shakyground: a web service to serve GMPE-based ground motion fields

Weatherill, Graeme; Pittore, Massimiliano; Haas, Michael; Brinckmann, Nils; Rüster, Matthias; Gomez-Zapata, Juan Camilo

doi:10.5880/riesgos.2021.004

Cited by 4 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The scenario-based ground motions and tsunami inundation maps are available in Gómez Zapata et al, (2021c); Harig and Rakowsky, (2021), respectively. The first set was calculated making use of the Shakyground script (Weatherill et al, 2021) which relies on the OpenQuake Engine (Pagani et al, 2014), whilst the second set was calculated using the TsunAWI software. The exposure and fragility models for both hazard-vulnerability schemes (earthquake and tsunami) are available in Gómez Zapata et al, (2021a, b) and were adapted to fulfil the data formats required by the scripts provided by Assetmaster and Modelprop (Pittore et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Scenario-based multi-risk assessment from existing single-hazard vulnerability models. An application to consecutive earthquakes and tsunamis in Lima, Peru

Zapata

Pittore

Brinckmann

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

Abstract. Multi-hazard risk assessments for building portfolios exposed to earthquake shaking followed by a tsunami are usually based on empirical vulnerability models calibrated on post-event surveys of damaged buildings. The applicability of these models cannot easily be extrapolated to other regions of larger/smaller events. Moreover, the quantitative evaluation of the damages related to each of the hazards type (disaggregation) is impossible. To investigate cumulative damage on extended building portfolios, this study proposes an alternative and modular method to probabilistically integrate sets of single-hazard vulnerability models that are being constantly developed and calibrated by experts from various research fields to be used within a multi-risk context. This method is based on the proposal of state-dependent fragility functions for the triggered hazard to account for the pre-existing damage, and the harmonisation of building classes and damage states through their taxonomic characterization, which is transversal to any hazard-dependent vulnerability. This modular assemblage also allows us to separate the economic losses expected for each scenario on building portfolios subjected to cascading hazards. We demonstrate its application by assessing the economic losses expected for the residential building stock of Lima, Peru, a megacity commonly exposed to consecutive earthquake and tsunami scenarios. We show the importance of accounting for damage accumulation on extended building portfolios while observing a dependency between the earthquake magnitude and the losses derived for each hazard scenario. For the commonly exposed residential building stock of Lima exposed to both perils, we find that classical tsunami empirical fragility functions lead to an underestimation of predicted losses for lower magnitudes (Mw) and large overestimations for larger Mw events in comparison to our state-dependent models and cumulative damage method.

show abstract

Section: Discussionmentioning

confidence: 99%

Scenario-based multi-risk assessment from existing single-hazard vulnerability models. An application to consecutive earthquakes and tsunamis in Lima, Peru

Zapata

Pittore

Brinckmann

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…These spatially distributed seismic ground motion fields are simulated for the selected earthquake scenario. They are generated through the Shakyground webservice (Weatherill et al, 2021), that for case of Lima Metropolitan area, uses the Montalva et al (2017) GMPE in terms of expected accelerations (i.e., peak ground acceleration (PGA) and spectral periods (SA) 0.3, and 1.0 seconds). This web service was constructed based on the QuakeML data formats (Schorlemmer et al, 2011) and the OpenQuake Engine (Pagani et al, 2014).…”

Section: Web Services and Workflow Controlmentioning

confidence: 99%

Between global risk reduction goals, scientific-technical capabilities and local realities: a novel modular approach for multi-risk assessment

Schoepfer,

Lauterjung,

Riedlinger

et al. 2023

Preprint

View full text Add to dashboard Cite

Abstract. We live in a rapidly changing and globalized society. The increasing connectivity of our economic, social and technical systems, growing urbanization and the consequences of climate change might lead to more complex risks and multi-dimensional vulnerability. The complex relationships between multiple and consecutive natural hazards, exposed population and built environment result in a variety of cascading eﬀects which, if are often not considered appropriately by decision makers, can result to inadequate or even misleading risk management strategies. Thus, hindering eﬀicient prevention and mitigation measures, and ultimately undermining the resilience of societies. International efforts to identify global risks such as within the Sustainable Development Goals, the Sendai Framework for Disaster Risk Reduction 2015–2030 or the Paris Agreement help to raise awareness, set priorities and face such global problems. However, even if the formulated goals for risk reduction are comprehensible in their abstraction, decision-makers still face major challenges when it comes to local implementation. In this paper, we present a conceptual approach for multi-risk assessment which was designed to serve potential users like disaster risk managers, urban planners or operators of critical infrastructures to increase their capabilities. Based on recent scientific and technical capabilities, we developed a tool through an iterative participative approach which has allowed users to explore various scenarios of multiple hazards, cascading effects and their impacts. As an illustrative example, the experiences during this stimulating process are documented for Lima Metropolitan area (Peru), a megacity exposed to various natural hazards, among them, earthquakes and tsunamis. We believe that such an approach for exploring, describing and quantifying different What-if scenarios can constitute a valuable approach for understanding complex multi-risk processes, preparing for such situations, and serving as a good practice that can be replicated for other areas of interest in the future.

show abstract

“…A worst-case mega-thrust earthquake scenario with a moment magnitude of Mw 9.1, similar to the one that hit Valparaíso in 1730, was considered [52]. We simulated a finite fault model and obtained their respective spatially distributed spectral accelerations using Shakyground 1.0 [85], a script that relies on the OpenQuake Engine [86]. The basic parameters used in the simulations were the following: hypocentre location (longitude = −71.5 • ; latitude = −32.5 • ; depth = 25 km), strike = 3 • , dip = 15 • , and rake = 117 • .…”

Section: Generation Of Seismic Ground Motion Fields For An Earthquake...mentioning

confidence: 99%

“…The data regarding the building surveys have been made available in [81,114]. The software utilised in this study are freely available from [85,100,101]. The data and codes related to the Bayesian exposure models presented in this study are available on request from the corresponding author.…”

Section: Data Availability Statementmentioning

confidence: 99%

Towards a Sensitivity Analysis in Seismic Risk with Probabilistic Building Exposure Models: An Application in Valparaíso, Chile Using Ancillary Open-Source Data and Parametric Ground Motions

Zapata

Zafrir

Pittore

et al. 2022

IJGI

Self Cite

View full text Add to dashboard Cite

Efforts have been made in the past to enhance building exposure models on a regional scale with increasing spatial resolutions by integrating different data sources. This work follows a similar path and focuses on the downscaling of the existing SARA exposure model that was proposed for the residential building stock of the communes of Valparaíso and Viña del Mar (Chile). Although this model allowed great progress in harmonising building classes and characterising their differential physical vulnerabilities, it is now outdated, and in any case, it is spatially aggregated over large administrative units. Hence, to more accurately consider the impact of future earthquakes on these cities, it is necessary to employ more reliable exposure models. For such a purpose, we propose updating this existing model through a Bayesian approach by integrating ancillary data that has been made increasingly available from Volunteering Geo-Information (VGI) activities. Its spatial representation is also optimised in higher resolution aggregation units that avoid the inconvenience of having incomplete building-by-building footprints. A worst-case earthquake scenario is presented to calculate direct economic losses and highlight the degree of uncertainty imposed by exposure models in comparison with other parameters used to generate the seismic ground motions within a sensitivity analysis. This example study shows the great potential of using increasingly available VGI to update worldwide building exposure models as well as its importance in scenario-based seismic risk assessment.

show abstract

Shakyground: a web service to serve GMPE-based ground motion fields

Cited by 4 publications

References 8 publications

Scenario-based multi-risk assessment from existing single-hazard vulnerability models. An application to consecutive earthquakes and tsunamis in Lima, Peru

Scenario-based multi-risk assessment from existing single-hazard vulnerability models. An application to consecutive earthquakes and tsunamis in Lima, Peru

Between global risk reduction goals, scientific-technical capabilities and local realities: a novel modular approach for multi-risk assessment

Towards a Sensitivity Analysis in Seismic Risk with Probabilistic Building Exposure Models: An Application in Valparaíso, Chile Using Ancillary Open-Source Data and Parametric Ground Motions

Contact Info

Product

Resources

About