Estimates of Seismic Potential in the Marmara Sea Region from Block Models of Secular Deformation Constrained by Global Positioning System Measurements

Meade, Brendan J.

doi:10.1785/0120000837

Cited by 215 publications

(249 citation statements)

References 28 publications

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“…Slip partitioning in the Marmara region was previously examined by GPS data such that the computed slips rate range between 23 and 28 mm/ yr and between 2.9 to 9.6 mm/yr for the northern and southern branches, respectively (Meade et al, 2002;Nyst and Thatcher, 2004;Reilinger et al, 2006;Aktuğ et al, 2009;Le Pichon and Kreemer, 2010). The majority of these studies consider Marmara region.…”

Section: Gps Datamentioning

confidence: 99%

A hypothesis for the alternative southern branch of the North Anatolian Fault Zone, Northwest Turkey

Seyítoğlu¹,

Kaypak²,

Aktuğ³

et al. 2016

Türkiye Jeoloji Bülteni / Geological Bulletin of Turkey

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This paper proposes an alternative route for the southern branch of the North Anatolian Fault Zone (NAFZ) using evidence from morphotectonic features, seismology, GPS and recently published Magnetotelluric and Transient Electromagnetic (MT) data. In this new route, the southern branch connects with the main branch of the NAFZ in Bolu via the Gölpazarı pull-apart basin and Mudurnu. The slip distribution of the NAFZ as taken from GPS data indicates that the newly hypothesized route is the second most important branch of the NAFZ.

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Section: Gps Datamentioning

confidence: 99%

A hypothesis for the alternative southern branch of the North Anatolian Fault Zone, Northwest Turkey

Seyítoğlu¹,

Kaypak²,

Aktuğ³

et al. 2016

Türkiye Jeoloji Bülteni / Geological Bulletin of Turkey

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“…Many researches were conducted along the fault for investigating seismic potential (Stein et al, 1997;Barka and Reilinger, 1997;Reilinger et al, 2000Reilinger et al, , 2006Ayhan et al, 2002;Ergintav et al, 2002Ergintav et al, , 2007Meade et al, 2002;Ozener et al, 2009). The GCM-ITU network, that we focused, was established around Iznik region, and the points of network scattered along the middle strand.…”

Section: Introductionmentioning

confidence: 99%

Investigation of long period crustal deformation on the inactive branch of the North Anatolian Fault Zone

Akay

Özener

2009

Nat. Hazards Earth Syst. Sci.

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Abstract. The western part of North Anatolian Fault (NAF) bifurcates around Mudurnu into two fault segments: northern and southern branch. The latter bifurcates again at west of Pamukova and creates middle strand. This study aimed to analyze crustal movement along the middle strand near Iznik which is considered as inactive fault. We focused on a microgeodetic network called General Command of MappingIstanbul Technical University (GCM-ITU) network around this segment. In order to obtain displacement values, five campaigns performed on the network which were used in the study. The displacements of the stations were estimated relative to the fixed stations located at the south of the network. The coordinates of the stations were calculated from the triangulation measurements realized in 1941 and 1963 , trilateration measurements in 1981 , and GPS campaigns in 2004. Then, mean displacements of the network ranging between 7 mm/yr and 18 mm/yr were obtained for these years.In the second part of the study, the GPS data were reprocessed by adding three stations from Marmara Continuous GPS Network (MAGNET). Details of MAGNET can be found Ergintav et al. (2002). Estimated displacements were ranging between 3 mm/yr and 13 mm/yr for 2004 and 2007. TUBI station of IGS network was taken as stable.

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“…The analyses of continuous time series, in cases where no abrupt changes have occurred in time series due to earthquakes and the principal strain accumulation from the interseismic velocities, are the most common elds of interest (Sagiya et al 2000. The information about the mechanism of earthquakes during coseismic deformation and the information about rheology of the fault zone and surrounding crust can also be obtained easily from the continuous time series recorded by dense and permanent GNSS networks (Ayhan et al 2001; Ergintav et al 2002). Turkey is one of the most active countries in terms of plate tectonics and is frequently hit by severe earthquakes.…”

Section: The Gnss Observationsmentioning

confidence: 99%

“…The maximum values of seismic strain rate are placed in the Aegean and in the eastern and western parts Jimenez-Munt and Sabadini, 2002). The implications of low strains are studied in the western and central Marmara Sea block that accounts for recoverable growth of elastic strain (Meade et al 2002). By integrating the GNSS data from all over Turkey with the IGS network, we tried to estimate the crustal strain in Turkey between the years 2009 and 2017.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Crustal Strain in Turkey from Continuous GNSS Measurements in the Interval 2009–2017

Ansari

Corumluoǧlu

Sharma

2017

Journal of Geodetic Science

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Abstract:The present study investigates the crustal strain in Turkey by using data from the Turkish permanent GNSS network (TPGN) and international GNSS services (IGS) observations for a period of 9 years, 2009 t0 2017. The positional variation of GNSS sites is studied to understand the coordinate reliability, interseismic and coseismic e ects and linear velocities as well as three dimensional principal strains across the country. The study of coordinate reliability shows that the horizontal and vertical residuals in 2013 and 2015 are of the order of 100 mm per coordinate or higher than those of 2009 and 2011 and 10 times higher than those of 2017. The changes in baseline length relative to an arbitrary zero-o set for the selected period shows that the most of the sites have displacement in the interval − to 10 mm but some sites have larger variations. These displacements are mostly related to motion of the Turkish tectonic plate, regional crustal deformation and small amounts of errors in GNSS positioning. The most GNSS site velocities located all over Turkey give signicant information for the study. The GNSS data shows that the Anatolian plate relative to the Eurasia is moving in a western direction in the central part of Turkey and starts to move in a south-westerly direction in the west part of the country. The westward motion of Anatolia increases gradually from 20 mm/yr in central Anatolia to 30 mm/yr in south-west Turkey. The numerical simulation of the crustal strain in the Aegean region shows a maximum 1.0446×10 − compressional principal strain rate while the second principal strain rate is zero. The strain in Central Anatolia is evidently dominated by extensional deformations and the principal strain rate reaches to 0.9589×10 − with maximum extension. The Marmara Region network is subject to an extensional principal strain (0.6608×10 − )which is also revealed in the Mediterranean Region with a 0.5682×10 − extension. The present analysis of GNSS data over the region may complement towards the understanding of the stability of regional tectonics and long term aseismic strain inside the country.

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Estimates of Seismic Potential in the Marmara Sea Region from Block Models of Secular Deformation Constrained by Global Positioning System Measurements

Cited by 215 publications

References 28 publications

A hypothesis for the alternative southern branch of the North Anatolian Fault Zone, Northwest Turkey

A hypothesis for the alternative southern branch of the North Anatolian Fault Zone, Northwest Turkey

Investigation of long period crustal deformation on the inactive branch of the North Anatolian Fault Zone

Numerical Simulation of Crustal Strain in Turkey from Continuous GNSS Measurements in the Interval 2009–2017

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