scholarly journals New findings on the effects of the İzmit <i>M</i><sub>w</sub>=7.4 and Düzce <i>M</i><sub>w</sub>=7.2 earthquakes

2011 ◽  
Vol 11 (2) ◽  
pp. 267-272 ◽  
Author(s):  
H. S. Kutoglu ◽  
R. N. Celik ◽  
M. T. Ozludemir ◽  
C. Güney
Keyword(s):  
Black Hole ◽  
Geodetic Network ◽  
North Anatolian Fault ◽  
Fault Line ◽  
Surface Rupture ◽  
The North ◽  
Gps Network ◽  
New Findings ◽  
Surface Ruptures

Abstract. The 17 August 1999 İzmit Mw=7.4 and the 12 November 1999 Düzce Mw=7.2 earthquakes caused a 150 km long surface rupture in the western part of the North Anatolian Fault. The coseismic slips along the fault line and the trace of the surface ruptures were studied in detail in Barka (1999), Reilinger et al. (2000), Cakir et al. (2003a, b) and Ergintav (2009) after the earthquakes. However, the basin to the east of Sapanca Lake was a black hole for all investigations because there was no geodetic network and no significant deformation that could be obtained by using InSAR techniques. In this study, findings on the abovementioned basin have been reinterpreted through a GPS network newly explored. This interpretation shows coseismic slips of between 2–3 m, and links the surface rupture to the main branch of the North Anatolian Fault (NAF) in the east Sapanca basin.

New observations on the 1939 Erzincan Earthquake surface rupture on the Kelkit Valley segment of the North Anatolian Fault Zone, Turkey

2013 ◽  
Vol 65 ◽  
pp. 259-271 ◽  
Author(s):  
Halil Gürsoy ◽  
Orhan Tatar ◽  
Zafer Akpınar ◽  
Ali Polat ◽  
Levent Mesci ◽  
...  
Keyword(s):  
Fault Zone ◽  
North Anatolian Fault ◽  
North Anatolian Fault Zone ◽  
Surface Rupture ◽  
The North ◽  
Valley Segment

scholarly journals Relaxation on the Ismetpasa segment of the North Anatolian Fault after the Golcuk <i>M</i><sub>w</sub> = 7.4 and Duzce <i>M</i><sub>w</sub> = 7.2 shocks

2010 ◽  
Vol 10 (12) ◽  
pp. 2653-2657 ◽  
Author(s):  
H. S. Kutoglu ◽  
H. Akcin ◽  
O. Gundogdu ◽  
K. S. Gormus ◽  
E. Koksal
Keyword(s):  
Creep Rate ◽  
Creep Behaviour ◽  
Geodetic Network ◽  
Fault Slip ◽  
North Anatolian Fault ◽  
The North ◽  
Observation Methods ◽  
The 1950S

Abstract. The Ismetpasa segment of the North Anatolian Fault (NAF) is a rare place where aseismic fault slip (creep) has been observed. Its creep behaviour has been monitored using different observation methods since the 1950s. The findings obtained from the studies until 1990s showed that the creep rate exponentially decreased before the major shocks in 1999, Golcuk (Mw = 7.4) and Duzce (Mw = 7.2). After these shocks, three GPS periods observation in 2002, 2007 and 2008 were carried out on the geodetic network established around the segment. The evaluations of these observations showed that the creep behaviour relaxed after the major earthquakes. This result demonstrates that the creep behaviour of the Ismetpasa segment might be a warning before future major earthquakes.

Coseismic surface rupture during the 2018 Mw 7.5 Palu earthquake, Sulawesi Island, Indonesia

2020 ◽  
Author(s):  
Dengyun Wu ◽  
Zhikun Ren ◽  
Jinrui Liu ◽  
Jie Chen ◽  
Peng Guo ◽  
...  
Keyword(s):  
Slip Rate ◽  
Flower Structure ◽  
Surface Rupture ◽  
Sand Liquefaction ◽  
Field Surveys ◽  
The North ◽  
Field Investigations ◽  
Surface Ruptures ◽  
Lateral Offset ◽  
Coseismic Offset

Sulawesi Island is located at the triple junction between the converging Australian, Sunda, and Philippine plates. The magnitude (Mw) 7.5 Palu earthquake occurred on 28 September 2018 on Sulawesi Island and caused serious casualties. The causative fault of the Palu earthquake was the left-lateral, strike-slip Palu-Koro fault, which has a rapid slip rate. We experienced this earthquake in Palu City and conducted field investigations on coseismic surface ruptures 1 d after the earthquake. Field surveys revealed that the coseismic surface ruptures were characterized by left-lateral offset, en echelon tensional cracks, mole tracks within a narrow zone, and large areas of sand liquefaction that increased the damage and losses. We measured the coseismic displacements along surface ruptures and observed a maximum coseismic offset of ∼6.2 m. The rupture traces in the north Palu Basin near Palu City mark the previously unmapped Palu-Koro fault. Based on the field investigations, we determined the exact location of the Palu-Koro fault within the Palu Basin and found that the Palu-Koro fault zone can be divided into three branches: F1, F2, and F3, forming a typical flower structure.

scholarly journals Triggered creep rate on the Ismetpasa segment of the North Anatolian Fault

2008 ◽  
Vol 8 (6) ◽  
pp. 1369-1373 ◽  
Author(s):  
H. S. Kutoglu ◽  
H. Akcin ◽  
H. Kemaldere ◽  
K. S. Gormus
Keyword(s):  
Creep Rate ◽  
Geodetic Network ◽  
North Anatolian Fault ◽  
Earthquake Risk ◽  
Major Earthquake ◽  
The North ◽  
The World

Abstract. The Ismetpasa segment of the North Anatolian Fault is one of the rare places in the world where aseismic creep event has been observed. This segment was ruptured during both the 1944, Mw=7.2, Gerede and 1951, Mw=6.9, Kursunlu earthquakes. After these earthquakes, the segment has not experienced a major earthquake anymore. Starting from 1957, many studies using different technologies have been carried out to determine the creep rate of the segment. All these studies until 2002 revealed that the creep movement of the segment slowed down. The new observation campaign of the Ismetpasa geodetic network shows that the Ismetpasa segment has ceased the slowing trend and started to gain speed. This might be interpreted as an increasing earthquake risk for this segment.

Materials to the lichen flora of Samurskiy Ridge (high mountainous Dagestan)

2018 ◽  
Vol 52 (2) ◽  
pp. 397-406
Author(s):  
A. B. Ismailov ◽  
G. P. Urbanavichus
Keyword(s):  
North Caucasus ◽  
Lichenicolous Fungi ◽  
Greater Caucasus ◽  
Altitudinal Range ◽  
The North ◽  
New Findings ◽  
Mountainous Landscapes ◽  
First Time ◽  
Lichen Flora

The lichens and lichenicolous fungi of high mountainous landscapes of Samurskiy Ridge were studied in altitudinal range 2400–3770 m a. s. l. for the first time and 112 species are recorded. Among them 33 species, 10 genera (Arthrorhaphis, Baeomyces, Calvitimela, Epilichen, Lambiella, Psorinia, Rufoplaca, Sagedia, Sporastatia, Tremolecia) and 4 families (Anamylopsoraceae, Arthrorhaphidaceae, Baeomycetaceae, Hymeneliaceae) are new for Dagestan, six species (Buellia uberior, Carbonea atronivea, Lecanora atrosulphurea, Lecidea fuliginosa, L. swartzioidea, Rhizoplaca subdiscrepans) are reported for the first time for the Greater Caucasus and two species (Acarospora subpruinata and Rhizocarpon postumum) — for the North Caucasus. Most of the new findings were collected from 3500–3770 m a. s. l.

scholarly journals The implications of fault zone transformation on aseismic creep: Example of the North Anatolian Fault, Turkey

2017 ◽  
Vol 122 (6) ◽  
pp. 4208-4236 ◽  
Author(s):  
Maor Kaduri ◽  
Jean-Pierre Gratier ◽  
François Renard ◽  
Ziyadin Çakir ◽  
Cécile Lasserre
Keyword(s):  
Fault Zone ◽  
North Anatolian Fault ◽  
The North
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