Seismotectonic Aspects of the North Anatolian Fault Zone Between Bolu and Havza

1982 ◽  
pp. 129-135 ◽  
Author(s):  
A. A. Barka ◽  
P. L. Hancock
Keyword(s):  
Fault Zone ◽  
North Anatolian Fault ◽  
North Anatolian Fault Zone ◽  
The North

scholarly journals Electrical characterization of the North Anatolian Fault Zone underneath the Marmara Sea, Turkey by ocean bottom magnetotellurics

2013 ◽  
Vol 193 (2) ◽  
pp. 664-677 ◽  
Author(s):  
T. Kaya ◽  
T. Kasaya ◽  
S. B. Tank ◽  
Y. Ogawa ◽  
M. K. Tuncer ◽  
...  
Keyword(s):  
Fault Zone ◽  
Electrical Characterization ◽  
North Anatolian Fault ◽  
Marmara Sea ◽  
Ocean Bottom ◽  
North Anatolian Fault Zone ◽  
The North

Crustal seismic attenuation parameters in the western region of the North Anatolian Fault Zone

2020 ◽  
Vol 134 ◽  
pp. 101694 ◽  
Author(s):  
Gizem Izgi ◽  
Tuna Eken ◽  
Peter Gaebler ◽  
Tom Eulenfeld ◽  
Tuncay Taymaz
Keyword(s):  
Fault Zone ◽  
Seismic Attenuation ◽  
North Anatolian Fault ◽  
Western Region ◽  
North Anatolian Fault Zone ◽  
The North ◽  
The Western Region

A strategy of tectonomagnetic observation for monitoring possible precursors to earthquakes in the western part of the North Anatolian Fault Zone, Turkey

1991 ◽  
Vol 193 (4) ◽  
pp. 359-368 ◽  
Author(s):  
N. Oshiman ◽  
M.K. Tunçer ◽  
Y. Honkura ◽  
S. Bariş ◽  
O. Yazici ◽  
...  
Keyword(s):  
Fault Zone ◽  
North Anatolian Fault ◽  
North Anatolian Fault Zone ◽  
The North

scholarly journals Temporal variations of the fractal properties of seismicity in the western part of the north Anatolian fault zone: possible artifacts due to improvements in station coverage

1995 ◽  
Vol 2 (3/4) ◽  
pp. 147-157 ◽  
Author(s):  
A. O. Öncel ◽  
Ö. Alptekin ◽  
I. Main
Keyword(s):  
Fault Zone ◽  
Statistical Significance ◽  
Rock Fracture ◽  
Aegean Sea ◽  
B Value ◽  
Temporal Variations ◽  
North Anatolian Fault ◽  
North Anatolian Fault Zone ◽  
The North ◽  
Northern Aegean Sea

Abstract. Seismically-active fault zones are complex natural systems exhibiting scale-invariant or fractal correlation between earthquakes in space and time, and a power-law scaling of fault length or earthquake source dimension consistent with the exponent b of the Gutenberg-Richter frequency-magnitude relation. The fractal dimension of seismicity is a measure of the degree of both the heterogeneity of the process (whether fixed or self-generated) and the clustering of seismic activity. Temporal variations of the b-value and the two-point fractal (correlation) dimension Dc have been related to the preparation process for natural earthquakes and rock fracture in the laboratory These statistical scaling properties of seismicity may therefore have the potential at least to be sensitive short- term predictors of major earthquakes. The North Anatolian Fault Zone (NAFZ) is a seismicallyactive dextral strike slip fault zone which forms the northern boundary of the westward moving Anatolian plate. It is splayed into three branches at about 31oE and continues westward toward the northern Aegean sea. In this study, we investigate the temporal variation of Dc and the Gutenberg-Richter b-value for seismicity in the western part of the NAFZ (including the northern Aegean sea) for earthquakes of Ms > 4.5 occurring in the period between 1900 and 1992. b ranges from 0.6-1.6 and Dc from 0.6 to 1.4. The b-value is found to be weakly negatively correlated with Dc (r=-0.56). However the (log of) event rate N is positively correlated with b, with a similar degree of statistical significance (r=0.42), and negatively correlated with Dc (r=-0.48). Since N increases dramatically with improved station coverage since 1970, the observed negative correlation between b and Dc is therefore more likely to be due to this effect than any underlying physical process in this case. We present this as an example of how man-made artefacts of recording can have similar statistical effects to underlying processes.

scholarly journals Imaging of shear wave attenuation along the central part of the North Anatolian Fault Zone, Turkey

2019 ◽  
Vol 23 (4) ◽  
pp. 913-927 ◽  
Author(s):  
Peter Gaebler ◽  
Tuna Eken ◽  
Hüseyin Önder Bektaş ◽  
Tom Eulenfeld ◽  
Ulrich Wegler ◽  
...  
Keyword(s):  
Shear Wave ◽  
Fault Zone ◽  
Wave Attenuation ◽  
North Anatolian Fault ◽  
North Anatolian Fault Zone ◽  
The North

scholarly journals Reconstructing the deformation of the North Anatolian Fault Zone through restoring the Oligo–Miocene exhumation pattern of the Almacık Block (northwestern Turkey) based on the apatite (U–Th)/He ages

2019 ◽  
Vol 56 (11) ◽  
pp. 1202-1217
Author(s):  
Gürsel Sunal ◽  
Mehmet Korhan Erturaç ◽  
Pınar Gutsuz ◽  
István Dunkl ◽  
Ziyadin Cakir
Keyword(s):  
20Th Century ◽  
Fault Zone ◽  
North Anatolian Fault ◽  
North Anatolian Fault Zone ◽  
Exhumation Rate ◽  
Original State ◽  
The North ◽  
Northwestern Turkey ◽  
East West

The Almacık Block is an approximately 73 km long and 21 km wide tectonic sliver formed by the North Anatolian Fault Zone in northwestern Turkey. Morphologically, it is one of the most pronounced structures along the North Anatolian Fault Zone. All the segments bounding the Almacık Block were ruptured during the second half of the 20th century. The fifty-four apatite (U–Th)/He ages we obtained showed that the region including the Almacık Block was exhumed during the Oligo–Miocene interval and then original exhumation pattern was distorted by the North Anatolian Fault Zone during the Miocene to recent. To interpret this distortion and to reconstruct it to the original state, we modelled “Λ”-shaped mountain fronts in the most probable deformation scenarios. The block has been tilted southward about an approximately east–west-trending horizontal (slightly dipping to the east) axis. As a result of this rotation, the northern part of the block has been uplifted about 2800 m, whereas the southern part has subsided about 430 m, likely during the last 2.5 Myr. The exhumation in the studied region started at around 34 Ma and lasted until 16 Ma with a mean exhumation rate of about 60 m/Myr.

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