A detailed study of the active crustal deformation in the Aegean and surrounding area

Papazachos, C. B.; Kiratzi, Anastasia

doi:10.1016/0040-1951(95)00047-x

Cited by 196 publications

(121 citation statements)

References 40 publications

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“…Geographically, this extension appears to have a general N-S to NNE-SSW direction in the eastern part of the study area (West Turkey, North Aegean), which is locally modified to a NNW-SSE to NW-SE direction, as we move to the west towards the continental part of Greece, in agreement with earlier neotectonic (e.g. Mercier et al, 1989) and seismological (Papazachos and Kiratzi, 1996) observations. The direction of extension changes completely in the area adjacent to the Hellenic Arc subduction zone and the Adriatic-Eurasia southern collision system, since the T axes exhibit a more or less E-W direction across the Albanides and Hellenides mountain chain, up to the central part on southern Peloponnesus and the area of Cythera-CreteCarpathos-Rhodes (South Greece).…”

Section: Fault Plane Solution Informationsupporting

confidence: 75%

A detailed seismic zonation model for shallow earthquakes in the broader Aegean area

Vamvakaris

Papazachos

Papaioannou

et al. 2016

Nat. Hazards Earth Syst. Sci.

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Abstract. In the present work we propose a new seismic zonation model of area type sources for the broader Aegean area, which can be readily used for seismic hazard assessment. The definition of this model is based not only on seismicity information but incorporates all available seismotectonic and neotectonic information for the study area, in an attempt to define zones which show not only a rather homogeneous seismicity release but also exhibit similar active faulting characteristics. For this reason, all available seismological information such as fault plane solutions and the corresponding kinematic axes have been incorporated in the analysis, as well as information about active tectonics, such as seismic and active faults. Moreover, various morphotectonic features (e.g. relief, coastline) were also considered. Finally, a revised seismic catalogue is employed and earthquake epicentres since historical times (550 BC-2008) are employed, in order to define areas of common seismotectonic characteristics, that could constitute a discrete seismic zone. A new revised model of 113 earthquake seismic zones of shallow earthquakes for the broader Aegean area is finally proposed. Using the proposed zonation model, a detailed study is performed for the catalogue completeness for the recent instrumental period.Using the defined completeness information, seismicity parameters (such as G-R values) for the 113 new seismic zones have been calculated, and their spatial distribution was also examined. The spatial variation of the obtained b values shows an excellent correlation with the geotectonic setting in the area, in good agreement with previous studies. Moreover, a quantitative estimation of seismicity is performed in terms of the mean return period, T m , of large (M ≥ 6.0) earthquakes, as well as the most frequent maximum magnitude, M t , for a typical time period (T = 50 yr), revealing significant spatial variations of seismicity levels within the study area. The new proposed seismic zonation model and its parameters can be readily employed for seismic hazard assessment for the broader Aegean area.

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Section: Fault Plane Solution Informationsupporting

confidence: 75%

A detailed seismic zonation model for shallow earthquakes in the broader Aegean area

Vamvakaris

Papazachos

Papaioannou

et al. 2016

Nat. Hazards Earth Syst. Sci.

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“…These results agree with the fault plane solution proposed by Martakis, (2003) and with the extension referred by Papazachos and Kiratzi, (1996) for this area. At the SW part of the area the hypocenters become deeper and the focal mechanisms denote thrust.…”

Section: XLVII No 3 -1274supporting

confidence: 82%

“…Geomorphological work performed by King et al, (1983) using boundary-element modelling, identified a substantial left lateral strike-slip component in addition to the compressional motion. Furthermore, geological and geomorphological research which was conducted by IGSR and IFP, (1966) and King et al, (1993) as well as crustal deformation studying of the Aegean area by Papazachos and Kiratzi, (1996), implied similar results.…”

Section: Introductionsupporting

confidence: 60%

“…Most of the fault plane solutions for these earthquakes are of normal and oblique normal type. These can be explained as a result of the extension which is taking place in this area (Papazachos and Kiratzi, 1996) and (Doutsos and Koukouvelas, 1998). Additional information comes from Tselentis et al, (2006) seismotectonic study in Epirus, who detected N-NE strike-slip focal mechanisms and sometimes clear N-S mechanisms.…”

Section: XLVII No 3 -1275mentioning

confidence: 99%

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Earthquake relocation for North-Western Greece using 3D crustal model; method comparison and seismotectonic interpretation.

et al. 2016

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A dense microseismic network was installed in Northwestern Greece for a period of eleven months. A total of 1368 events were recorded and located using a 1D model. These events were also used to derive a 3D velocity model for the area. This work presents results from further processing of the data using (a) simple location method of events in a 1D medium through Hypo71 standard procedure; (b) location via the probabilistic, non-linear earthquake location method in 3D medium; (c) relocation of the events using the Double - Difference method in 1D medium; and (d) the same relocation procedure invoking 3D medium. The application of different location methodologies results in slightly different locations, which are evaluated using as criterion the compactness of hypocenter distribution. The three point method was used in order to derive linear characteristics from the hypocenter distribution and the final results were compared against the focal mechanisms of the events as computed using the polarity method and the 3D velocity model. The combination of accurately computed hypocenters and focal mechanisms provides important information for the seismotectonics of Epirus

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“…the Corinth, Patraikos and Amvarakikos gulfs, while it lies in between them. These structures are controlled by the north-south extension, present in the area and indicated by seismicity, focal mechanisms and GPS measurements (Papazachos and Kiratzi, 1996;Cocard, 1999).…”

Section: Geological -Tectonic Settingmentioning

confidence: 99%

The April 2007 Swarm in Trichonis Lake Using Data From a Microseismic Network

et al. 2017

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A detailed study of the active crustal deformation in the Aegean and surrounding area

Cited by 196 publications

References 40 publications

A detailed seismic zonation model for shallow earthquakes in the broader Aegean area

A detailed seismic zonation model for shallow earthquakes in the broader Aegean area

Earthquake relocation for North-Western Greece using 3D crustal model; method comparison and seismotectonic interpretation.

The April 2007 Swarm in Trichonis Lake Using Data From a Microseismic Network

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