Observations of Repeating Earthquakes at a Single Seismic Station Near Lake Sapanca

Diğdem Acarel

Makale detayları

Observations of Repeating Earthquakes at a Single Seismic Station Near Lake Sapanca

Yazarlar:

Diğdem Acarel

Yayıncı:

Afyon Kocatepe University

Ana Başlıklar:

Jeoloji (Diğer)

Dergi:

Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.23 Issue 6, pp.1533-1541

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001305877

pISSN:

2149-3367

Anahtar kelimeler:

Özet:

 The North Anatolian Fault Zone NAFZ, which forms the plate boundary between Anatolian Plate and Eurasian Plate, is one of the most active transform fault zones in the world. Following two consecutive magnitude M7 earthquakes in 1999, an intensified monitoring of western portion of NAF is commenced. Dense networks of onshoreoffshore seismic, acoustic, geodetic sensors and surface creep and strain sensors were installed. A single seismic sensor among these, which is located at the midpoint of 1999 ruptures, near Lake Sapanca, exhibits some unusual seismic activity. On a fault segment where creep is known to be present, a series of minor seismic events was observed with identical locations and a recurrence time of three years. These events are quite short in duration and highly similar in their waveforms. Using a single station approach, their angle of incidence and back azimuth were found to coincide with the location of two M2.3 and M2.1 events. At this stage, it is not clear whether these events reflect fault creep at seismogenic depth. Nevertheless, these initial observations emphasize the necessity of monitoring this segment more densely, where recurrent minor earthquakes are likely to be observed.

 The North Anatolian Fault Zone NAFZ, which forms the plate boundary between Anatolian Plate and Eurasian Plate, is one of the most active transform fault zones in the world. Following two consecutive magnitude M7 earthquakes in 1999, an intensified monitoring of western portion of NAF is commenced. Dense networks of onshoreoffshore seismic, acoustic, geodetic sensors and surface creep and strain sensors were installed. A single seismic sensor among these, which is located at the midpoint of 1999 ruptures, near Lake Sapanca, exhibits some unusual seismic activity. On a fault segment where creep is known to be present, a series of minor seismic events was observed with identical locations and a recurrence time of three years. These events are quite short in duration and highly similar in their waveforms. Using a single station approach, their angle of incidence and back azimuth were found to coincide with the location of two M2.3 and M2.1 events. At this stage, it is not clear whether these events reflect fault creep at seismogenic depth. Nevertheless, these initial observations emphasize the necessity of monitoring this segment more densely, where recurrent minor earthquakes are likely to be observed.

 The North Anatolian Fault Zone NAFZ, which forms the plate boundary between Anatolian Plate and Eurasian Plate, is one of the most active transform fault zones in the world. Following two consecutive magnitude M7 earthquakes in 1999, an intensified monitoring of western portion of NAF is commenced. Dense networks of onshoreoffshore seismic, acoustic, geodetic sensors and surface creep and strain sensors were installed. A single seismic sensor among these, which is located at the midpoint of 1999 ruptures, near Lake Sapanca, exhibits some unusual seismic activity. On a fault segment where creep is known to be present, a series of minor seismic events was observed with identical locations and a recurrence time of three years. These events are quite short in duration and highly similar in their waveforms. Using a single station approach, their angle of incidence and back azimuth were found to coincide with the location of two M2.3 and M2.1 events. At this stage, it is not clear whether these events reflect fault creep at seismogenic depth. Nevertheless, these initial observations emphasize the necessity of monitoring this segment more densely, where recurrent minor earthquakes are likely to be observed.

 Kuzey Anadolu Fay Zonu KAFZ, Anadolu ve Avrasya plakaları arasındaki levha sınırını oluşturur ve dünya üzerindeki en aktif transform faylarından biridir. 1999da meydana gelen iki M7 depremin ardından, KAFın batı kısmı yoğun bir şekilde izlenmeye başlanmıştır. Karadadenizde yoğun ağlarla sismik, akustik, jeodezik, yüzey kripi ve gerinimi ölçen sensörler kurulmuştur. Bu sensörler arasında, 1999 kırılmalarının merkezinde, Sapanca Gölü yakınlarında bulunan tek bir sismik sensör, bazı olağandışı sismik aktiviteler kaydetmiştir. Krip gözlemlenen bir fay segmentinde, aynı konumlarda, üç yıllık tekrarlama süresi ile küçük sismik olaylar gözlemlenmiştir. Bu olaylar oldukça kısa sürelidir ve dalga formları açısından oldukça benzerdir. Tek istasyon yaklaşımı kullanılarak, bu olayların çıkış açısı ve geri azimut açısının M2.3 ve M2.1 büyüklüğündeki depremlerin konumuna denk geldiği bulunmuştur. Bu aşamada, bu olayların sismojenik derinlikte krip yansıtıp yansıtmadığı belirsizdir. Bununla birlikte, bu ilk gözlemler, tekrarlayan depremler gözlenen bu segmentin daha yoğun bir şekilde izlenmesinin gerekliliğini vurgulamaktadır.

Makale detayları

Observations of Repeating Earthquakes at a Single Seismic Station Near Lake Sapanca

Yazarlar:

Diğdem Acarel

Yayıncı:

Afyon Kocatepe University

Ana Başlıklar:

Jeoloji (Diğer)

Dergi:

Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.23 Issue 6, pp.1533-1541

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001305877

pISSN:

2149-3367

Creep

Lake Sapanca

North Anatolian Fault

Repeating Earthquakes

Single Seismic StationKuzey Anadolu Fayi

Krip

Sapanca Gölü

Tekrarlayan Depremler

Tek Bir Sismik Istasyon

Sayı

Makale detayları

Yazarlar: Diğdem Acarel

Yayıncı: Afyon Kocatepe University

Ana Başlıklar: Jeoloji (Diğer)

Dergi: Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.23 Issue 6, pp.1533-1541

Belge Tipi: Makale

Yayın Tarihi: 12/2023

Belge Dili: İngilizce

Document ID (Org No.): 2001305877

pISSN: 2149-3367

Sayı

Yazarlar:

Diğdem Acarel

Yayıncı:

Afyon Kocatepe University

Ana Başlıklar:

Jeoloji (Diğer)

Dergi:

Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.23 Issue 6, pp.1533-1541

Belge Tipi:

Makale

Yayın Tarihi:

12/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001305877

pISSN:

2149-3367