A deterministic seismic hazard analysis for shallow earthquakes in Greece

Moratto, Luca; Orlecka‐Sikora, Beata; Costa, Giovanni; Suhadolc, Peter; Papaioannou, Ch.; Papazachos, C. B.

doi:10.1016/j.tecto.2007.05.004

Cited by 35 publications

(22 citation statements)

References 37 publications

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“…Here the assumption is that earthquakes that are capable of causing significant ground motion originate as far as approximately 800 km radius away 30 from the most northwestern point of Peninsular Malaysia -the island of Langkawi -and the southernmost point -considered Singapore here. DSHA oftentimes presents the worst-case scenario of an earthquake event and consideration of the probability of location and time of occurrence plays a less critical role compared to PSHA (Moratto et al, 2007). Although ground motion data collection only began since 2004 in Peninsular Malaysia, records of great earthquakes (Mw >8.0) from the Sumatra region are available for the period since 1797 (Newcomb and McCann, 1987).…”

Section: Source Modellingmentioning

confidence: 99%

Revisiting Seismic Hazard Assessment For Peninsular Malaysia Using Deterministic And Probabilistic Approaches

Loi¹,

Raghunandan²,

Swamy³

2018

Preprint

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Abstract. Seismic hazard assessments -both deterministic and probabilistic, for Peninsular Malaysia have been carried out using peak ground acceleration (PGA) data recorded between 2004 and 2016 by the Malaysian Meteorological Departmentusing triaxial accelerometers placed at 19 seismic stations within the peninsula and monitored. Seismicity source modelling for the deterministic seismic hazard assessment (DSHA) used historical point sources whereas in the probabilistic (PSHA) approach, line and areal sources were used. The earthquake sources comprised the Sumatran Subduction Zone (SSZ), Sumatran 10 Fault Zone (SFZ), and local intraplate (LI) faults. Gutenberg-Richter law b-value for the various zones identified within the SSZ ranged between 0.56 and 1.06 (mean = 0.83) and that for the zones within SFZ, between 0.53 and 1.13 (mean = 0.84).Suitable ground motion prediction equations (GMPEs) for Peninsular Malaysia along with other pertinent information were used for constructing a logic tree for PSHA of the region. The DSHA "critical-worst" scenario suggests PGAs of 0.07-0.80 ms -2 , whilst the PSHA suggests mean PGAs of 0.06-0.42 ms -2 and 0.12-0.70 ms -2 at 10% and 2% probability of exceedance in 15 50 years, respectively. Both DSHA and PSHA, despite using different source models and methodologies, conclude that the central-western cities of Peninsular Malaysia located between 2°N and 4°N are most susceptible to high PGAs due to neighbouring active Sumatran sources SFZ and SSZ. Surprisingly, the relatively less active SFZ source with low magnitude seismicity appeared as the major contributor, due to its close proximity. Potential hazard due to SSZ mega-earthquakes should not be dismissed, however. Finally, DSHA performed using the limited intraplate seismic data from the Bukit Tinggi (LI) fault 20 at a reasonable Mw 5.0 predicted a PGA of ~0.40 ms -2 at Kuala Lumpur.

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Section: Source Modellingmentioning

confidence: 99%

Revisiting Seismic Hazard Assessment For Peninsular Malaysia Using Deterministic And Probabilistic Approaches

Loi¹,

Raghunandan²,

Swamy³

2018

Preprint

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“…Over the past decades, numerous seismic hazard studies have been conducted with the two methods (e.g., Joshi et al, 2007;Kolathayar and Sitharam, 2012;Moratto et al, 2007;Sitharam and Vipin, 2011;Stirling et al, 2011). The two methods have also been prescribed in various technical references.…”

Section: Dsha Versus Pshamentioning

confidence: 99%

A procedure to select ground-motion time histories for deterministic seismic hazard analysis from the Next Generation Attenuation (NGA) database

Huang

Zhu

2017

Nat. Hazards Earth Syst. Sci.

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Abstract. In performance-based seismic design, groundmotion time histories are needed for analyzing dynamic responses of nonlinear structural systems. However, the number of ground-motion data at design level is often limited. In order to analyze seismic performance of structures, ground-motion time histories need to be either selected from recorded strong-motion database or numerically simulated using stochastic approaches. In this paper, a detailed procedure to select proper acceleration time histories from the Next Generation Attenuation (NGA) database for several cities in Taiwan is presented. Target response spectra are initially determined based on a local ground-motion prediction equation under representative deterministic seismic hazard analyses. Then several suites of ground motions are selected for these cities using the Design Ground Motion Library (DGML), a recently proposed interactive ground-motion selection tool. The selected time histories are representatives of the regional seismic hazard and should be beneficial to earthquake studies when comprehensive seismic hazard assessments and site investigations are unavailable. Note that this method is also applicable to site-specific motion selections with the target spectra near the ground surface considering the site effect.

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“…This method has attracted the main aim of some seismic hazard researches in recent years, e.g. the studies carried out for Greece (Moratto et al, 2007), Turkey (Kayabali & Akin, 2003) and for critical infrastructures in California (Mualchin, 2005).…”

Section: Modified Probabilistic Seismic Hazard Evaluationmentioning

confidence: 99%

Modified probabilistic approach for seismic hazard zoning of Golestan region, Iran

Abdollahzadeh¹,

Khanmohammadi²,

Tajrishi³

2014

European Journal of Environmental and Civil Engineering

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In this article, seismic zoning maps of Golestan based on modified methodology of probabilistic seismic hazard analysis have been prepared. For this purpose, first, major seismotectonic provinces of Iran surrounding the study region are delineated and seismicity parameters are evaluated for each province. By determining the main active faults of the region and preparing the earthquake catalog containing 19 historical events and 270 instrumental events, 25 potential seismic sources are modelled as area sources in the region. In order to properly reflect the inhomogeneity of seismicity in time and space, and to avoid underestimation of potential hazard of large magnitude earthquakes, the annual mean occurrence rate of earthquakes in each seismotectonic province should be allocated to each magnitude interval in the corresponding potential seismic sources, using the spatial distribution function. In this research, different kinds of seismological, tectonic and geophysical data are used to indicate the possible future earthquake activities in the interest region, providing basis for evaluation of spatial distribution function. Seismic hazard assessment is carried out by considering a universal attenuation relationship and using the SEISRISKIII computer program for the area in a radius of 200 km from centre of Gorgan (the centre of Golestan province). The study region is divided into a series of grid points and seismic hazard analysis for every grid point is carried out using characteristics of seismic activity in seismotectonic provinces and potential seismic sources. Horizontal Peak Ground Acceleration (PGA) for different seismic hazard levels is evaluated by modified probabilistic estimation. Finally, seismic hazard zoning maps of Golestan for 10% Probability of exceedance (PE) and 2% PE in 50 years and for three types of the site soil are prepared and compared with the seismic hazard macrozonation of Iran based on standard 2800.

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A deterministic seismic hazard analysis for shallow earthquakes in Greece

Cited by 35 publications

References 37 publications

Revisiting Seismic Hazard Assessment For Peninsular Malaysia Using Deterministic And Probabilistic Approaches

Revisiting Seismic Hazard Assessment For Peninsular Malaysia Using Deterministic And Probabilistic Approaches

A procedure to select ground-motion time histories for deterministic seismic hazard analysis from the Next Generation Attenuation (NGA) database

Modified probabilistic approach for seismic hazard zoning of Golestan region, Iran

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