Evaluation of the predictive performance of regional and global ground motion predictive equations against Greek strong motion data

Sotiriadis, Dimitris; Margaris, Basil

doi:10.1016/j.soildyn.2022.107656

Cited by 5 publications

(7 citation statements)

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“…Although the selected evaluation approach offers an objective way of ranking the selected GMPMs, it has been observed that different evaluation approaches lead to different rankings, and, therefore, GMPMs for Probabilistic Seismic Hazard Analysis (PSHA) must be combined with corresponding weighting factors, which were finally calculated (Table 1). The same results have been derived from a similar analysis proposed by Sotiriadis and Margaris [53]. Based on the analysis, the first three GMPMs were selected to be implemented for the entire GR/TR cross border area.…”

Section: Ground Motion Prediction Equations and Selection Of Seismic ...mentioning

confidence: 94%

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Rapid Earthquake Damage Assessment and Education to Improve Earthquake Response Efficiency and Community Resilience

Papatheodorou,

Theodoulidis,

Klimis

et al. 2023

Sustainability

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Southeastern Europe faces a significant earthquake threat, endangering lives, property, and infrastructure thus jeopardizing sustainable development. The development of a Rapid Earthquake Damage Assessment System (REDAS) designed to deliver crucial earthquake damage information for scenario planning, real-time response, and bolstering public awareness and preparedness is presented. In doing so, REDAS enhances community resilience and safeguards sustainability. REDAS comprises a Rapid Earthquake Damage Assessment platform (REDA.p), a smartphone application, and an Educational Hub (Edu.Hub). REDA.p provides both scenario-based and near real-time seismic damage evaluation of structures, gas pipelines, and geotechnical failures, based on harmonized Ground Motion Prediction Equations and a comprehensive building taxonomy scheme covering the area under investigation. To assess regional landslide hazards, the Infinite Slope Model and a statistics-based model have been implemented, alongside a statistical model for liquefaction probability assessment. Validated against historical data, REDA.p integrates real-time input from key earthquake monitoring networks in the region, covering cross-border areas as well, while in designated urban zones, the system is enhanced by real-time data from a dense earthquake monitoring network deployed in selected school buildings. The smartphone app and Edu.Hub disseminate critical information, guidelines, and tools to improve public prevention, preparedness, and response capacities, thereby enhancing societal resilience.

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Section: Ground Motion Prediction Equations and Selection Of Seismic ...mentioning

confidence: 94%

“…Figure 4. Top: Map displaying the GMPM Zones[52][53][54][55][56]58] for the implementation area and their respective geographic coverage. The main provider (NIEP, AFAD, ITSAK) of earthquake related real time data is auto-selected based on the epicenter location of the triggering earthquake and the seismic faults in any of the three area sections.…”

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confidence: 99%

Rapid Earthquake Damage Assessment and Education to Improve Earthquake Response Efficiency and Community Resilience

Papatheodorou,

Theodoulidis,

Klimis

et al. 2023

Sustainability

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“…Although the GMPE of Boore et al ( 2021) is currently the most reliable tool to estimate the ground motion in Greece, within the context of PSHA, more GMPEs should be implemented to construct a ground motion logic tree so that the associated epistemic uncertainty is reduced. Recently, [18] evaluated and ranked several GMPEs using the statistical methods of Log-likelihood (LLH) [34], Multivariate LLH [35], and Euclidean Distance Ranking (EDR) [36] and the most updated strong motion dataset for Greece. Their study included multiple ground motion intensity measures, such as the Peak Ground Acceleration (PGA) and Velocity (PGV), as well as some 5%-damped spectral acceleration ordinates (S a ).…”

Section: Ground Motion Modelingmentioning

confidence: 99%

“…Herein, to assess the seismic hazard in REMTH, the approach of Probabilistic Seismic Hazard Assessment (PSHA) [17] is implemented along with the logic tree approach to take into account the uncertainty in both seismic source and ground motion modeling. The selection of the Ground Motion Prediction Equations (GMPEs) is based on the work of Sotiriadis and Margaris (2023) [18], who have evaluated many global, European, and local GMPEs through data-driven methods based on the comparison between their estimates and strong-motion data from Greece. Moreover, various seismic source models that have been proposed during the last few years for Greece are considered in this study.…”

Section: Introductionmentioning

confidence: 99%

Seismic Hazard in Greece: A Comparative Study for the Region of East Macedonia and Thrace

et al. 2023

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Greece is located in one of the most seismically active regions in Europe. Many seismic hazard studies have been performed for various sites around Greece, at a regional or local scale. However, the latest national seismic hazard map, currently used for the seismic design of buildings and infrastructure, was published in 2000 and has not been updated since then. In light of recent advances in seismic source and ground motion modeling, the present study focuses on a comparative Probabilistic Seismic Hazard Assessment (PSHA) for the region of East Macedonia and Thrace (EMTH), located in Northern Greece. Various seismic source models are implemented and compared against an updated earthquake catalog to form the necessary source model logic tree. The ground motion logic tree is composed of Ground Motion Prediction Equations (GMPEs), which have been proven suitable for implementation in Greece. PSHA results are presented for the most important cities of East Macedonia and Thrace in a comparative way, which highlights the variability of the seismic hazard among the various seismic source models. An updated seismic hazard map of the study area is proposed, and a comparative disaggregation analysis is performed to estimate the earthquake scenarios with the largest contribution to the seismic hazard.

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“…A comprehensive effort of GMPE ranking for Greece was not performed until very recently, when Sotiriadis and Margaris [85] used the most up-to-date Greek strong motion dataset and evaluated a number of GMPEs using three different approaches. The most widely used goodness-of-fit measures to evaluate the performance of GMPEs (also employed by Sotiriadis and Margaris [85]) are the Log-Likelihood (LLH) method, proposed by Scherbaum et al [86], and the Euclidean Distance-Based Ranking (EDR) scheme, suggested by Kale and Akkar [87]. Every approach has its strengths and inherent deficiencies; hence, the results should be used as an advisory tool for experts, rather than a black-box routine.…”

Section: Evaluation Of the Predictive Perfomance Of Gmpes-gmpe Rankingmentioning

confidence: 99%

A Logic-Tree Approach for Probabilistic Seismic Hazard Assessment in the Administrative Region of Attica (Greece)

et al. 2023

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Probabilistic Seismic Hazard Assessment (PSHA) was carried out for the administrative region of Attica (Greece). Peak Ground Acceleration (PGA) and Peak Ground Velocity (PGV) values were calculated for return periods of 475 and 950 years for five sub-areas covering the entire region. PGA hazard curves and Uniform Hazard Spectra (UHS) in terms of spectral acceleration (Sa) values were generated for Athens, Methana, and the capitals of each island of Attica (Salamina, Aegina, Poros, Hydra, Spetses, Kythira, and Antikythira). Area sources were adopted from the Euro-Mediterranean Seismic Hazard Model 2013 (ESHM13) and its update, ESHM20, taking into account both crustal and slab tectonic environments. Ground Motion Prediction Equations (GMPEs) proposed for the Greek territory were ranked for PGA and PGV. Each GMPE was reconstructed as a weighted model, accounting for normal and non-normal focal mechanisms for each area source. PGA, PGV, and Sa values were computed using a logic tree, integrating the seismotectonic models as major branches and sub-logic trees, comprised of multiple ranked GMPEs for each area source, as minor branches. The results showed higher seismic hazard values in sub-areas near the Gulf of Corinth and the slab interface, which could indicate a need to revise the active building code in Attica.

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Evaluation of the predictive performance of regional and global ground motion predictive equations against Greek strong motion data

Cited by 5 publications

References 58 publications

Rapid Earthquake Damage Assessment and Education to Improve Earthquake Response Efficiency and Community Resilience

Rapid Earthquake Damage Assessment and Education to Improve Earthquake Response Efficiency and Community Resilience

Seismic Hazard in Greece: A Comparative Study for the Region of East Macedonia and Thrace

A Logic-Tree Approach for Probabilistic Seismic Hazard Assessment in the Administrative Region of Attica (Greece)

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