Afyon Akşehir Grabeninde Jeodezik Yamulma Alanları ile b Parametresi Arasındaki İlişkilerin Belirlenmesi

Yıl 2021, Cilt: 21 Sayı: 6, 1366 - 1376, 31.12.2021

Tolga Toydemir İbrahim Tiryakioğlu , Tamer Baybura , Mehmet Ali Uğur Halil İbrahim Solak

https://doi.org/10.35414/akufemubid.1001334

Öz

Akşehir-Simav Fay Sistemi (ASFS) Batı Anadolu genişleme bölgesinde yer almakta olup en önemli sismojenik kuşaklardan biridir. Sistem içerisinde yer alan oblik/eğim atımlı normal fay segmentlerinden dolayı çok sayıda horst ve graben türü yapılar bulunmaktadır. Bu çalışma kapsamında ASFS’nin Afyon-Akşehir Grabeni (AAG) kısımda 27 noktalık bir GNSS ağı kurulmuş ve 2012-2018 yılları arasında 5 kampanya GNSS ölçüsü gerçekleştirilmiştir. Elde edilen veriler GAMIT/GLOBK yazılımı değerlendirilmiş ve tüm noktaların Avrasya plakası sabit hızları hesaplanmıştır. Hız alanı kullanılarak, GEODSUIT yazılımı bölge yamulma alanları (strain) hesaplanmış ve sonuçlar deprem verileri yardımıyla hesaplanan b parametreleri karşılaştırılmıştır. Elde edilen bulgular 2002 Çay-Eber depremlerinden sonra bölgenin batısına doğru jeodezik yamulmaların arttığını göstermektedir.

Anahtar Kelimeler

Afyon Akşehir Grabeni, GNSS, GAMIT/GLOBK, B parametre, Yamulma alanı

Destekleyen Kurum

AKU BAPK- TUBİTAK

Proje Numarası

12.TEMATIK.02 115Y

The Determination of Relations between Geodetic Strain Field and b Parameter in Afyon Akşehir Graben

Öz

Akşehir-Simav Fault System (ASFS) is one of the most important seismojenic zones in the Western Anatolia Extensional Zone. Because of oblique-slip normal fault segments, it contains many parallel horst and graben type structures. This study was carried out with GNSS measurements obtained from 27 GNSS points established in the Afyon-Akşehir Graben (AAG) part of ASFS. GNSS measurements were carried out as 5 campaigns between 2012 and 2018. As a result of the evaluation of the GNSS data using GAMIT/GLOBK software, the velocity vectors fixed to Eurasian plate of the sites were calculated. The strain rates computed with GEODSUIT software, and the b parameters calculated using earthquake data. Based on the comparisons of the strain rates and b parameters, the study results show that after the 2002 Çay Eber earthquakes, the geodetic strains increased towards the west of the region.

Anahtar Kelimeler

Afyon Akşehir Graben, GNSS, GAMIT/GLOBK, B parameter, Strain Field

Proje Numarası

12.TEMATIK.02 115Y

Kaynakça

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