Zoning of the Italian territory in terms of expected peak ground acceleration derived from complete synthetic seismograms

Costa, Giovanni; Panza, G. F.; Suhadolc, Peter; Vaccari, Franco

doi:10.1016/0926-9851(93)90023-r

Cited by 65 publications

(53 citation statements)

References 6 publications

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“…To define the physical properties of the source-site paths, the territory is divided into an appropriate number of polygons representing the average lithosphere properties at regional scale (Costa et al [17]). Synthetic seismograms are computed by the modal summation technique for sites placed at the nodes of the grid that covers the national territory, considering the average structural model associated to the regional polygon that includes the site.…”

Section: The Neo-deterministic Approach (Ndsha)mentioning

confidence: 99%

Earthquake recurrence and seismic hazard assessment: a comparative analysis over the Italian territory

Peresan¹,

Magrin²,

Nekrasova³

et al. 2013

WIT Transactions on the Built Environment

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Rigorous and objective testing of seismic hazard assessments against real seismic activity are a necessary precondition for any responsible seismic risk assessment. The reference hazard maps for the Italian seismic code, obtained with the classical probabilistic approach (PSHA) and the alternative ground shaking maps based on the neo-deterministic approach (NDSHA) are crosscompared and tested against the real seismicity for the territory of Italy. NDSHA is a methodology that allows for the sound definition of credible scenario events, based on the realistic physical modelling of ground motion from a wide set of possible earthquakes. The flexibility of NDSHA permits to account for earthquake recurrence and allows for the generation of ground motion maps at specified return periods that permits a straightforward comparison between the NDSHA and the PSHA maps.

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Section: The Neo-deterministic Approach (Ndsha)mentioning

confidence: 99%

Earthquake recurrence and seismic hazard assessment: a comparative analysis over the Italian territory

Peresan¹,

Magrin²,

Nekrasova³

et al. 2013

WIT Transactions on the Built Environment

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“…The following crustal velocity structure models are adopted: for the Alps, Costa et al [1993] at 45. 40N-6.11E; for the Pyrenees, Souriau and Granet [1995] at 43.05N-0.04W; and for the upper Rhine graben, Lopes Cardozo [2003] at 47.76N-7.25E.…”

Section: Selected Regions and Crustal Structure Modelsmentioning

confidence: 99%

The importance of crustal structure in explaining the observed uncertainties in ground motion estimation

Douglas

Aochi

Suhadolc

et al. 2006

Bull Earthquake Eng

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In this short article, the possible reduction in the standard deviation of empirical ground motion estimation equations through the modelling of the effect of crustal structure is assessed through the use of ground-motion simulations. Simulations are computed for different source-to-site distances, focal depths, focal mechanisms and for crustal models of the Pyrenees, the western Alps and the upper Rhine Graben. Through the method of equivalent hypocentral distance introduced by Douglas et al. [2004] to model the effect of crustal structure in empirical equations, the scatter associated with such equations derived using these simulated data could be reduced to zero if real-to-equivalent hypocentral distance mapping functions were derived for every combination of mechanism, depth and crustal structure present in the simulated dataset. This is, obviously, impractical. The relative importance of each parameter in affecting the decay of ground motions is assessed here. It is found that variation in focal depth is generally more important than the effect of crustal structure when deriving the real-to-equivalent hypocentral distance mapping functions. In addition, mechanism and magnitude do not have an important impact on the decay rate.

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“…The seismic hazard is evaluated by two approaches, the deterministic seismic hazard analysis and the probabilistic seismic hazard analysis. The deterministic seismic hazard analysis evaluates hazard from the most severe earthquake event (Costa et al, 1993). The probabilistic seismic hazard analysis evaluates hazard from the past earthquake events database (Cornell, 1968).…”

Section: Introductionmentioning

confidence: 99%

Deterministic Seismic Hazard Analysis in Thailand using Active Fault Data

Janpila¹,

Foytong²,

Ruangrassamee³

et al. 2016

IJTech

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To develop seismic design criteria for buildings, seismic hazard analysis is required to estimate the ground motion intensity with criteria such as peak ground acceleration (PGA). The seismic hazard can be analyzed by using two approaches: deterministic seismic hazard analysis (DSHA) and probabilistic seismic hazard analysis (PSHA). In these two approaches, the seismic hazard is evaluated from past earthquake events and active faults data. In Thailand, seismic hazard is classified in the low lying regions; however, in recently years, earthquakes have occurred frequently in the North of Thailand. To prevent and reduce damage due to earthquakes in the future, determination of seismic hazard is needed. This research proposes a deterministic seismic hazard map evaluated from nineteen active faults affecting Thailand. Two types of active faults are considered: first, an active fault in a subduction zone and second, a crustal fault. The seismic hazard is evaluated by using a ground motion prediction equation (GMPEs). Four GMPEs are weighted equally for seismic crustal fault, and two GMPEs are weighted equally for a seismic subduction zone. The hypocentral distance is used to evaluate the seismic hazard for all ground motion prediction equations. The Northern part and the Western part of Thailand are high seismic hazard regions, because there are active faults with the large possibility of earthquakes of a maximum magnitude. The seismic hazards in the North, West and Northeast of Thailand are about 0.60 g. The seismic hazard in Bangkok is about 0.25 g due to the Three Pagoda fault and Sri Sawat fault. The seismic hazard in the South of Thailand is about 0.40 g.

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Zoning of the Italian territory in terms of expected peak ground acceleration derived from complete synthetic seismograms

Cited by 65 publications

References 6 publications

Earthquake recurrence and seismic hazard assessment: a comparative analysis over the Italian territory

Earthquake recurrence and seismic hazard assessment: a comparative analysis over the Italian territory

The importance of crustal structure in explaining the observed uncertainties in ground motion estimation

Deterministic Seismic Hazard Analysis in Thailand using Active Fault Data

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