A new seismogenic model for the Kyparissiakos Gulf and western Peloponnese (SW Hellenic Arc)

2014-06-01
Papoulia, J.
Nicolich, R.
Makris, J.
Slejko, D.
Mascle, J.
Papadopoulos, G.
Anagnostou, Ch
Camera, L.
Daskalaki, E.
Fasoulaka, Ch
Fokaefs, A.
Fountoulis, I.
Garcia, J.
Gulkan, P.
Mariolakos, I.
Pomonis, A.
Santulin, M.
Tsambas, A.
Wardell, N.
Yalçıner, Ahmet Cevdet
In order to define seismic hazard with sufficient accuracy required for engineering applications, we initiated a multidisciplinary geoscientific study offshore western Peloponnese, focusing on the Kyparissiakos Gulf. Multibeam swath bathymetry localised unstable coastal slopes, which were later investigated by high resolution seismic profiles. Sediments and crustal structures were studied by multi-channel seismic recordings and active large-offsets seismic profiling. We established an onshore/offshore local seismic array that recorded 3500 micro-earthquakes in two months, and combined the results with historical and digital seismicity data in order to understand the active crustal deformation. These findings were further combined with geological mapping and tectonic observations from onshore Peloponnese and available offshore data. All this geologic and tectonic information was coupled with evidence from the analysis of historical and recent seismicity with the aim of identifying the seismogenic sources. We have defined nine seismogenic zones in western Peloponnese that are significantly different from those published in the literature. The new zonation addresses more accurately the deformation of the crust and sediments, and is the basis for a reliable seismic hazard analysis and seismic risk assessment. We identified a large area of the northern Peloponnese and the Ionian islands of Letkas, Cephalonia, Zakynthos and Strophades, to be involved in a SW-ward oriented crustal extrusion, dominated by two major dextral deforming strike slip faults: Cephalonia and Andravida with their offshore prolongation. Some changes with respect to the Greek zonation in the literature have been introduced in the region surrounding the new nine seismogenic zones to reach a homogeneous cover of the whole Peloponnese.
BOLLETTINO DI GEOFISICA TEORICA ED APPLICATA

Suggestions

The EU SEAHELLARC project: aims and main results
Papoulia, J.; Makris, J.; Mascle, J.; Slejko, D.; Yalçıner, Ahmet Cevdet (2014-06-01)
The SEAHELLARC project, supported by the European Commission, aimed at evaluating and computing seismic hazard and risk, as well as modelling tsunamis for the town of Pylos, in the western Peloponnese and neighboring region. This paper describes the main scopcs and results of the project.
Estimating the Liquefaction Related Geotechnical Hazards in Probabilistic Seismic Hazard Assessment Framework
Gülerce, Zeynep (2016-06-26)
The objective of this study is to develop a performance-based earthquake engineering (PBEE) framework for the liquefaction-related hazards and estimate the hazard levels for liquefaction-related engineering demand parameters (EDPs) in a probabilistic manner. Two efficient, sufficient, and hazard compatible EDPs: probability of liquefaction (PL) and post-liquefaction settlement (δL) are selected. Seismic demand models that explain the relationship between these EDPs and ground motion IMs are employed in a se...
Probabilistic seismic hazard assessment for east anatolian fault zone using planar source models
Menekşe, Akın; Gülerce, Zeynep; Department of Civil Engineering (2015)
The objective of this study is to perform probabilistic seismic hazard assessment (PSHA) using planar seismic source characterization models for East Anatolian Fault Zone (EAFZ) and to update the design ground motions to be used in the region. Development of planar seismic source models requires the definition of source geometry in terms of fault length, fault width, fault plane angles and segmentation points for each segment and associating the observed seismicity with defined fault systems. This complicat...
An evaluation of seismic hazard and potential damage in Gaziantep, Turkey using site specific models for sources, velocity structure and building stock
Karimzadeh, Shaghayegh; Arslan Kelam, Arzu; Yousefibavil, Karim; Akgün, Haluk; Askan Gündoğan, Ayşegül; KOÇKAR, MUSTAFA KEREM; Erberik, Murat Altuğ; Ciftci, Hacer; Pekcan, Onur (2022-03-01)
Assessment of potential seismic risk and losses in urban environments is necessary for several purposes ranging from risk mitigation to city and regional planning. It is well known that loss estimation should be performed within an interdisciplinary setting involving earth sciences and engineering. Field experience from recent events worldwide shows that the spatial variability of seismic damage is due to the combined effects of earthquake source properties, local site conditions and structural characterist...
A grid-based seismic hazard analysis application
Kocair, Çelebi; Şener, Cevat; Akkaya, Ayşen; Department of Computer Engineering (2010)
The results of seismic hazard analysis (SHA) play a crucial role in assessing seismic risks and mitigating seismic hazards. SHA calculations generally involve magnitude and distance distribution models, and ground motion prediction models as components. Many alternatives have been proposed for these component models. SHA calculations may be demanding in terms of processing power depending on the models and analysis parameters involved, and especially the size of the site for which the analysis is to be perf...
Citation Formats
J. Papoulia et al., “A new seismogenic model for the Kyparissiakos Gulf and western Peloponnese (SW Hellenic Arc),” BOLLETTINO DI GEOFISICA TEORICA ED APPLICATA, pp. 405–432, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37387.