Modelling of Stress and Seismicity in the South-Eastern Carpathians

Ismail‐Zadeh, Alik

doi:10.1007/978-94-010-0167-0_12

Cited by 3 publications

(3 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sperner et al (2005) considered this aseismic portion to be already delaminated from the overlying lithosphere. Ismail-Zadeh (2003) found that the maximum shear stress migrates from the upper surface of the slab to its lower surface in the course of changes in slab dynamics from its active subduction through roll-back movements to sinking solely due to gravity. The changes in stress distribution due to slab dynamics can explain the present location of hypocenters of Vrancea events at the side of the slab (imaged by the seismic tomography) adjacent to the Eastern European craton.…”

Section: Teleseismic Tomographymentioning

confidence: 98%

Tectonic stress, seismicity, and seismic hazard in the southeastern Carpathians

2007

View full text Add to dashboard Cite

Intermediate-depth earthquakes in the Vrancea region occur in response to stress generation due to descending lithosphere beneath the southeastern Carpathians. In this article, tectonic stress and seismicity are analyzed in the region on the basis of a vast body of observations. We show a correlation between the location of intermediate-depth earthquakes and the predicted localization of maximum shear stress in the lithosphere. A probabilistic seismic hazard assessment (PSHA) for the region is presented in terms of various ground motion parameters on the utilization of Fourier amplitude spectra used in engineering practice and risk assessment (peak ground acceleration, response spectra amplitude, and seismic intensity). We review the PSHA carried out in the region, and present new PSHA results for the eastern and southern parts of Romania. Our seismic hazard assessment is based on the information about the features of earthquake ground motion excitation, seismic wave propagation (attenuation), and site effect in the region. Spectral models and characteristics of site-response on earthquake ground motions are obtained from the regional ground motion data including several hundred records of small and large earthquakes. Results of the probabilistic seismic hazard assessment are consistent with the features of observed earthquake effects in the southeastern Carpathians and show that geological factors play an important part in the distribution of the earthquake ground motion parameters.

show abstract

Section: Teleseismic Tomographymentioning

confidence: 98%

Tectonic stress, seismicity, and seismic hazard in the southeastern Carpathians

2007

View full text Add to dashboard Cite

show abstract

“…The most important seismic area on the territory of Romania, described in the previous chapter, is the Vrancea area. A detailed survey of the geo-dynamics of this unique area in Europe was conducted by Ismail-Zadeh (2003).…”

Section: Definition Of the Seismic Area And Selecting The Maximum And...mentioning

confidence: 99%

Parametric Insurance—A Possible and Necessary Solution to Insure the Earthquake Risk of Romania

Radu

Alexandru

2022

Risks

View full text Add to dashboard Cite

The rapid growth over recent decades of the impact of natural disasters on economies, especially in vulnerable areas, urges stakeholders to promote innovative solutions involving risk transfers that account for the new risk exposures. These proposed solutions are designed to optimize and expedite the indemnification process, which can ultimately be beneficial for both policyholders and insurers alike. This article explores the possibility of supplementing the current Romanian dwelling insurance protection scheme with a parametric mechanism. To determine the triggering parameter of the insurance pay-out, the authors consider various hazard scenarios developed based on historical events. This paper focuses on Probable Maximum Loss (PML) determination computed for events with epicenters in the Vrancea (a region and a mountain in the Carpathians) seismic area. This area is the most exposed in Romania to earthquakes, and it includes the capital, Bucharest, which is the urban area with the highest population concentration and, consequently, the highest exposure to the discussed risks.

show abstract

“…Shear stresses beneath the SE-Carpathians induced by the sinking slab have been modelled by a corner flow model (Ismail Zadeh, 2003). The resulting contemporary shear stresses at the base of the crust in the vicinity of the Vrancea slab are approximately 5 MPa.…”

Section: Shear Stresses At the Base Of The Lithospherementioning

confidence: 99%

Attached or not attached—evidence from crustal stress observations for a weak coupling of the Vrancea slab in Romania

et al. 2010

View full text Add to dashboard Cite

The crustal stress pattern of Romania provides key insights into whether the Vrancea slab with its seismogenic volume between 70 and 175 km depth is still coupled to the crust and thus acts as a stress guide, or whether it is already in a state of detachment from the crust. Knowledge of the state of the slab under Vrancea is particularly critical because the slab attached to the crust can result in future strong earthquake occurrence in the crust and even in the currently aseismic zone between 40 km and 70 km depth, potentially causing severe damage. Our analysis of the contemporary tectonic stress observations in the context of potential stress sources and the comparison with numerical modelling shows that the crustal stress pattern in Romania is heterogeneous and does not contain a long wave-length stress pattern that would be expected if there is a strong present-day coupling between the subducted slab and the upper plate, or if lateral plate boundary forces would control the regional stress pattern. Therefore, we conclude that the crustal stress pattern of Romania is characterised by small differential horizontal stresses where local stress sources (third-order effects) are responsible for the observed heterogeneity of stress orientations and that the subducted slab under Vrancea is only weakly coupled to the crust.

show abstract

Modelling of Stress and Seismicity in the South-Eastern Carpathians

Cited by 3 publications

References 21 publications

Tectonic stress, seismicity, and seismic hazard in the southeastern Carpathians

Tectonic stress, seismicity, and seismic hazard in the southeastern Carpathians

Parametric Insurance—A Possible and Necessary Solution to Insure the Earthquake Risk of Romania

Attached or not attached—evidence from crustal stress observations for a weak coupling of the Vrancea slab in Romania

Contact Info

Product

Resources

About