PROJECTS / PROJELER

I. National Projects / Ulusal Projeler :

• Güneş Patlama İndeksi Verilerinin Non-Lineer Modellenmesi ve Boğaziçi Üniversitesi Kandilli Rasathanesi Fotosfer Gözlemlerinin Sayısallaştırılması (TBAG 107T878) *(6) (2008)

• Güneş Yatay Selostasının Modernizasyonu (07HT301) *(1) (2007)

• Güneş Fotosfer Gözlemlerinin Sayısal Ortama Aktarılarak İncelenmesi (06HT301) *(1) (2006-2007)

• Güneş Atmosferinin Çeşitli Dalgaboylarında ve Tutulmalarda Gözlenmesi (04S0103) *(1) (2004-2006)

• Gölcük Depremi Fay Zonu Üzerinde Sismik Tomografi Uygulaması (00T201) *(1) (2000-2006)

II. International Projects / Uluslararası Projeler :

• Developing the Scientific Basis For Monitoring, Modelling and Predicting Space Weather (ESF/COST Action 724) (2005)

• Marmara Bölgesi’nde MARNET ve IZINET Deprem Ağları Gelişimi (01T0202) *(1) (3) (4) (5) (2001-2005)

• PC Bazlı Uzun Periyotlu Üç Bileşen Sayısal Sismograf Sistemi *(1) (2) (3) (1999-2000)

• Doğu Marmara Bölgesi’nin Mikro Deprem Etkinliği (00T0202) *(4) (1) (1999-2003)

• Kuzey Anadolu Fayı’nın Doğu Marmara Bölgesi’ndeki Yakın Dönem Etkinliği (99T203) (1999)

• IZINET Network : Multidisciplinary Research on Fault Activity in the Western Part of North Anatolian Fault Zone) Turkish-Japanese Joint Project / IZINET Deprem Ağı : Kuzey Anadolu Fay Zonu'nun Batı Kesiminde Çok Disiplinli Fay Aktivitesi Araştırmaları) Türk-Japon Ortak Projesi *(2) (3) (7)

* Destekleyen Kurum ve Kuruluşlar : (1) Boğaziçi Üniversitesi Araştırma Fonu, (2) B.Ü. Kandilli Rasathanesi ve Deprem Araştırma Enstitüsü, (3) Tokyo Teknoloji Enstitüsü, (4) Japon Milli Eğitim Bakanlığı, (5) Japan International Cooperation Agency (JICA), (6) TÜBİTAK EVRENA (Evrensel Araştırmacı) Programı (7) Kyoto Üniversitesi

MEETINGS / TOPLANTILAR (Çalıştay, Kongre, Sempozyum ve Sunumlar)

• [Invited Speaker / Davetli Konuşmacı] 'Bilim ve Sanatla' - "Kış Söyleşileri", İstanbul Cağaloğlu Anadolu Lisesi (06.01.2026)

• "6 Şubat 2023 Kahramanmaraş Depremleri: Yerbilimleri ve Mühendislik Perspektifinden 2. Yıl Çalıştayı", Boğaziçi Üniversitesi Kandilli Rasathanesi ve Deprem Araştırma Enstitüsü, İstanbul / Türkiye (06.02.2025)

• "Dünya'nın Çekirdeğinden Uzaya Jeomanyetik Alan" Seminer Programı, Boğaziçi Üniversitesi Kandilli Rasathanesi ve Deprem Araştırma Enstitüsü, İstanbul / Türkiye (15.11.2024)

• "5 Kasım Dünya Tsunami Farkındalık Günü" Çalıştayı, Boğaziçi Üniversitesi Kandilli Rasathanesi ve Deprem Araştırma Enstitüsü, İstanbul / Türkiye (05.11.2024)

• "Exchange of Knowledge and Expertise in the Field of Astronomy", Bogazici University KOERI & University of Malaya Workshop, B.U. Kandilli Observatory and Earthquake Research Institute, Istanbul / Türkiye (September 11, 2024)

• TÜBİTAK & JST Joint "J-RAPID Kandilli Workshop", B.U. Kandilli Observatory and Earthquake Research Institute, Istanbul / Türkiye (June 1-2, 2024)

• "Gezegenlerin İç Yapısı ve Evrimi (GİYE)" Çalıştayı, Ege Üniversitesi - Astronomi ve Uzay Bilimleri Bölümü (29-30 Kasım 2023)

• Active Tectonic Research Group Workshop (01-03 November 2023), Bogazici University / Aktif Tektonik Araştırma Grubu Çalıştayı / ATAG-26 (01-03 Kasım 2023), Boğaziçi Üniversitesi

• [Jury Member / Jüri Üyesi] "Junge Unternehmer 2023 : Genç Girişimciler Inovasyon Kampı, 'Deprem Case' Projeleri", Yıldız Teknik Üniversitesi (07.05.2023)

• [Invited Speaker / Davetli Konuşmacı] "Bilim ve Sanat Şenliği", İstanbul Cağaloğlu Anadolu Lisesi (27.04.2023)

• [Invited Speaker / Davetli Konuşmacı] Kadıköy Belediyesi Kozyatağı Kriton Curi Parkı Gönüllü Evi, Çevre ve Afet Komitesi (10.12.2019)

• [Invited Speaker / Davetli Konuşmacı] İstanbul Atatürk Anadolu Lisesi "Nisan'da Bilim ve İnsan" Bilim Konferansları (26.04.2019)

• 11th Workshop 'Solar Influences on the Magnetosphere, Ionosphere and Atmosphere', Primorsko / Bulgaria (3-7 June 2019)

• SeisComP3 Users Group Meeting, Potsdam-Germany (16-18 January 2013)

• ORFEUS Observatory Coordination Workshop : Seismic Networks and Acceleration Networks, Istanbul-Türkiye (12-14 November 2012)

• Active Tectonic Research Group Workshop (18-19 October 2012), Bogazici University / Aktif Tektonik Araştırma Grubu Çalıştayı / ATAG-16 (18-19 Ekim 2012), Boğaziçi Üniversitesi

• Dünya Rasathaneler Forumu, İstanbul-Türkiye (4-6 Eylül 2008)

• The Fourth UN/ESA/NASA/JAXA Workshop on the International Heliophysical Year 2007 and Basic Space Science, “First Results from the International Heliophysical Year 2007”, Sozopol / Bulgaria (02-06 June 2008)

• First Middle East-Africa, Regional IAU Meeting, Cairo / Egypt (April 05-10 2008)

• Space Weather and Europe - An Educational Tool With the Sun (SWEETS) Meeting, Istanbul / Türkiye (December 6-7, 2007)

• International Heliophysical Year 2007 : New insights into Solar-terrestrial physics, Zvenigorod – Moscow / Russia (November 05-11, 2007)

• SWEETS (Space Weather and Europe - An Educational Tool With the Sun) / URSI-G Ulusal Çalıştayı, B.Ü. Kandilli Rasathanesi ve Deprem Araştırma Enstitüsü, İstanbul / Türkiye (7-10 Ekim 2007)

• International Symposium on Recent Observations of the Sun-Earth System (ISROSES), Bulgaria (September 17-22, 2006)

• IHY 2007 : International Heliophysical Year in Turkey, Antalya-Turkey (March 30 – April 1, 2006) [Local Organizing Committee Member]

• XV. Ulusal Astronomi Kongresi, İstanbul Kültür Üniversitesi (28 Ağustos – 1 Eylül 2006)

• AGU (American Geophysical Union) 1999 Fall Meeting Program, San Francisco, California (December 13-17, 1999)

Citations / Atıf sayısı : 430, (as of February 2026) - Google Scholar

ORCiD : 0000-0001-6369-2452

THESIS / TEZLER

[M.Sc. Thesis / Yüksek Lisans Tezi] : Pektaş, R. (2000) : “Recent Earthquake Clusterings in the Eastern Part of Marmara Region and Related Problems”, Yüksek Lisans Tezi, Jeofizik Anabilim Dalı, Boğaziçi Üniversitesi Kandilli Rasathanesi ve Deprem Araştırma Enstitüsü

[B.Sc. Thesis / Lisans Tezi] : Pektaş, R. (1996) : “Depremlerin Önceden Belirlenmesi Çalışmaları”, Lisans Tezi, Jeofizik Mühendisliği, İstanbul Üniversitesi Mühendislik Fakültesi

PAPERS, PRESENTATIONS AND BOOK SECTIONS / MAKALE, SUNUM VE KİTAP BÖLÜMLERİ

I. SOLAR PHYSICS / GÜNEŞ FİZİĞİ :

• "Periodic Variation of Solar Flare Index for the Last Solar Cycle (Cycle 24)", A Ozguc, A Kilcik, V Sarp, H Yesilyaprak, R Pektaş., Advances in Astronomy, 2021. Article ID 5391091, 8 pages, 2021, https://doi.org/10.1155/2021/5391091

• "Comparison of FI and the MCMESI For the Last Two Solar Cycles", Kilcik A., Ozguc A., Yesilyaprak H., Pektas R., Space Research and Technologies Institute Bulgarian Academy of Sciences, 23. 11th Workshop 'Solar Influences on the Magnetosphere, Ionosphere and Atmosphere', 3-7 June 2019 Primorsko / Bulgaria

• "The Variability of foF2 in Different Phases of Solar Cycle 23″, Ataç T., Özgüç A., Pektaş R., Journal of Atmospheric and Solar-Terrestrial Physics, 71, 5, 583-588, 2009. SCIE – CPCI-S

• “Ionospheric foF2 Data and Its Response to Solar Activity Cycles 21, 22 and 23″, R. Pektaş, A.Özgüç and T.Ataç., Solnechno-Zemnaya Fizika / Russian J. Solar-Terrestrial Physics, 12.T.2. (2008) 246-247

• “Examination of the solar cycle variation of foF2 for cycles 22 and 23”, Özgüç, A., Ataç, T., Pektaş, R., Journal of Atmospheric and Solar-Terrestrial Physics, 70, 2-4, 268-276, 2008. SCIE – CPCI-S

• “Response of Ionospheric foF2 Data to Solar Activity Cycles 21, 22 and 23″, R. Pektaş, A.Özgüç and T.Ataç., The Fourth UN/ESA/NASA/JAXA Workshop on the International Heliophysical Year 2007 and Basic Space Science, “First Results from the International Heliophysical Year 2007”, 02-06 June 2008, Sozopol / Bulgaria

• “The Variability of foF2 In Different Phases of Solar Cycle 23″, Ataç T., Özgüç A., Pektaş R., The Fourth UN/ESA/NASA/JAXA Workshop on the International Heliophysical Year 2007 and Basic Space Science, “First Results from the International Heliophysical Year 2007”, 02-06 June 2008, Sozopol / Bulgaria

• “Ionospheric foF2 Data and Its Response to Solar Activity Cycles 21, 22 and 23″, R. Pektaş, A.Özgüç and T.Ataç., First Middle East-Africa, Regional IAU Meeting, April 05-10 2008, Cairo / Egypt

• “Examination of the solar cycle variation of foF2 for cycles 22 and 23″, A. Özgüç, T. Ataç, and R. Pektaş., First Middle East-Africa, Regional IAU Meeting, April 05-10 2008, Cairo / Egypt

• “Ionospheric foF2 Data and Its Response to Solar Activity Cycles 21, 22 and 23″, R. Pektaş, A.Özgüç and T.Ataç., “International Heliophysical Year 2007 : New insights into Solar-terrestrial physics” Symposium, November 05-11, 2007, Zvenigorod – Moscow / Russia

• “International Heliophysical Year 2007 Turkish National Activities”, A.Özgüç, T.Ataç, R. Pektaş, Y.Tulunay, E.Tulunay, Z.Kocabaş, E.Altuntaş, T.Yapıcı, E.T.Şenalp., International Heliophysical Year (IHY) Science Kick-Off Meeting, February 19-20, 2007 Vienna / Austria

• “IHY Year 2007 National Activities in Turkey”, Y.Tulunay, E.Tulunay, Z.Kocabaş, E.Altuntaş, T.Yapıcı, E.T.Şenalp, A.Özgüç, T.Ataç, R. Pektaş., International Heliophysical Year (IHY) Science Kick-Off Meeting, February 19-20, 2007 Vienna / Austria

• “Investigation of the Solar Cycle Variation of foF2 by Using Solar Flare Index and MgII Core-to-Wing Index For the Cycles 22 and 23”, Atila Özgüç, Tamer Ataç and Rıza Pektaş., International Symposium on Recent Observations of the Sun-Earth System (ISROSES) / 'Solar Dynamics and the Response of Geospace', September 17-22, 2006 Bulgaria

• “23. Güneş Çevriminde Kısa Süreli Dönemli Değişimler”, Tamer Ataç, Atila Özgüç, Jan Rybak, Hülya Yeşilyaprak, Rıza Pektaş., XV. Ulusal Astronomi Kongresi, 28 Ağustos – 1 Eylül 2006, İstanbul Kültür Üniversitesi

II. GEOPHYSICS / JEOFİZİK :

• "Detailed Aftershock Activity of 1999 Izmit Earthquake, Turkey, Revealed from Local Seismic Networks", Akihiko Ito, Balamir Ucer, Serif Barıs, Ayako Nakamura, Yoshimori Honkura, Toshio Kono, Shuichiro Hori, Akira Hasegawa, Rıza Pektas, Ahmet Mete Isıkara., Abstracts of Oral and Poster Presentations, International Workshop on the North Anatolian, East Anatolian and Dead Sea Fault Systems: Recent Progress in Tectonics and Paleoseismology, and Field Training Course in Paleoseismology, volume 2003, p.14. Middle East Technical University (METU), Cultural and Convention Center, 2003

• “P-wave Velocity Structure of the Crust and Its Relationship to the Occurrence of the 1999 İzmit, Turkey, Earthquake and Aftershocks”, Ayako Nakamura, Akira Hasegawa, Akihiko Ito, Balamir Üçer, Şerif Barış, Yoshimori Honkura, Toshio Kono, Shuichiro Hori, Rıza Pektaş, Tolga Komut, Cengiz Çelik, A.Mete Işıkara., Bullettin of Seismological Society of America (BSSA), vol.92, no.1 [Dedicated Issue İzmit, Turkey, Earthquake of 17 August 1999], pp.330-338 , February 2002, DOI 10.1785/0120000803

• “Seismoelectromagnetic Effect Associated with the İzmit Earthquake and Its Aftershocks”, M. Matsushima, Y. Honkura, N. Oshiman, Ş. Barış, M.K. Tunçer, S.B. Tank, C. Çelik, F. Takahashi, M. Nakanishi, R. Yoshimura, R. Pektaş, T. Komut, E. Tolak, A. Ito, Y. Iio, A.M. Işıkara., Bullettin of Seismological Society of America (BSSA), vol.92, no.1 [Dedicated Issue İzmit, Turkey, Earthquake of 17 August 1999], pp.350-360 , February 2002, DOI 10.1785/0120000807

• “Microearthquake Activity Before the İzmit Earthquake in the Eastern Marmara Region, Turkey (1 January 1993-17 August 1999)”. Şerif Barış, Akihiko Ito, S. Balamir Üçer, Yoshimori Honkura, Nafiz Kafadar, Rıza Pektaş, Tolga Komut, Ahmet Mete Işıkara. Bullettin of Seismological Society of America (BSSA), vol.92, no.1 [Dedicated Issue İzmit, Turkey, Earthquake of 17 August 1999], pp.394-405 , February 2002, DOI 10.1785/0120000826

• “Aftershock Activity of the 1999 İzmit, Turkey, Earthquake Revealed From Microearthquake Observations”, Akihiko Ito, Balamir Üçer, Şerif Barış, Ayako Nakamura, Yoshimori Honkura, Toshio Kono, Shuichiro Hori, Akira Hasegawa, Rıza Pektaş, Ahmet Mete Işıkara..Bullettin of Seismological Society of America (BSSA), vol.92, no.1 [Dedicated Issue İzmit, Turkey, Earthquake of 17 August 1999], pp.418-427 , February 2002

• “Preliminary Results of Multidisciplinary Observations Before, During and After the Kocaeli (İzmit) Earthquake in the Western Part of the North Anatolian Fault Zone”, Y. Honkura, A.M. Işıkara, N. Oshiman, A. Ito, B. Üçer, Ş. Barış, M.K. Tunçer, M. Matsushima, R. Pektaş, C. Çelik, S.B. Tank, F. Takahashi, M. Nakanishi, R. Yoshimura, Y. Ikeda, T. Komut. Earth Planets Space, 52, no.4, 293-298, 2000, DOI 10.1186/bf03351638

• “Precise Distribution of Aftershocks of the Izmit Earthquake of August 17, 1999, Turkey”, A. Ito, B. Üçer, Ş. Barış, Y. Honkura, T. Kono, A. Nakamura, R. Pektaş, Y. Ishikawa, A.Işıkara., AGU (American Geophysical Union) 1999 Fall Meeting Program, December 13-17, 1999, San Francisco, California

• “Temporary Observation of Aftershocks of the 1999 Kocaeli, Turkey Earthquake”, Ayako Nakamura, Toshio Kono, Akihiko Ito, Yukiko Ishikawa, Şerif Barış, Rıza Pektaş, S.Balamir Üçer, A.Mete Işıkara, Yoshimori Honkura, Akira Hasegawa.
Seismological Society of Japan, Fall Meeting 1999, p.34, Japan.

• “Preliminary Report on the Aftershocks of 1999 İzmit Earthquake, Turkey, Revealed From Microearthquake Observations”, Akihiko Ito, Balamir Üçer, Şerif Barış, Yoshimori Honkura, Ayako Nakamura, Toshio Kono, Riza Pektas, Tolga Komut, Akira Hasegawa, A. Mete Isikara.

• "The 1999 İzmit and Düzce Earthquakes: Preliminary Results", Editors: Aykut Barka, Özgür Kozacı, Serdar Akyüz and Erhan Altunel. Publisher: Istanbul Technical University, pages 225-232). 2000 (kitap bölümü) | ISBN: 975-561-182-7

EDUCATIONAL ACTIVITIES / EĞİTİM FAALİYETLERİ

• [Invited Speaker / Davetli Konuşmacı] 'Bilim ve Sanatla' - "Kış Söyleşileri", İstanbul Cağaloğlu Anadolu Lisesi (06.01.2026)

• [Invited Speaker / Davetli Konuşmacı] “Artificial Intelligence (AI) Technologies in Geosciences and Earthquake Studies", Online Meeting with Robert College Students (August 22, 2024)

• [Invited Jury Member / Davetli Jüri Üyesi] “Junge Unternehmer 2023: Young Entrepreneurs Innovation Camp” Scientific Projects (May 7, 2023)

• [Invited Speaker / Davetli Konuşmacı] “The Sun”, Istanbul Cagaloglu Anatolian High School, Science and Art Festival (April 27, 2023)

• [Journal Refree / Dergi Hakemi] "Periodic Analysis of Forest Fire Numbers and Sunspot Numbers in Turkey" (Forestry Research Journal, DergiPark), 2022

• [Invited Speaker / Davetli Konuşmacı] “Our Star and its Effects on the Earth”, Kadikoy Municipality Kriton Curi Park Environment and Disaster Committee (December 10, 2019)

• [Invited Speaker / Davetli Konuşmacı] “Astronomical Studies at Kandilli Observatory & Our Star : The Sun”, Science and Human Conferences, Istanbul Ataturk Anatolian High School (April 26, 2019)

• [Event Manager / Etkinlik Sorumlusu] IAU100 – “Astronomy with the Historical Telescope at Kandilli Observatory”, 100 Hours of Astronomy - IAU (International Astronomical Union) 100th Anniversary Türkiye Events (January 10-13, 2019)

• [Instructor / Eğitmen] Astronomi Laboratuvarı okul ve ziyaretçi grupları eğitmeni / Instructor of school and group visitors at the Astronomy Laboratory (2003 - 2011) & (2018 - 2022)

• [Institutional Representative / Kurum Temsilcisi] Boğaziçi Üniversitesi'nin Türk Astronomi Birliği (Turkish Astronomical Society) Kurum Temsilcisi (2019 - devam)

• [As a Volunteer Worker / Gönüllü Çalışan] Conversion of 1 century-old historical glass print photographic records of Kandilli Observatory Astronomy Laboratory into digital format and adding them to the Observatory’s historical archive (2018) / Kandilli Rasathanesi Astronomi Laboratuvarı'na ait 1 asırlık tarihi cam baskı fotoğraf kayıtlarının dijital formata dönüştürülerek Rasathane tarihi arşivine kazandırılması

• [Founder Member / Kurucu Üye] 'Space Weather National Action Group' (2007)

• [Local Organisation Committee Member / Yerel Düzenleme Kurulu Üyesi] “International Heliophysical Year 2007” - Meeting, Antalya / Türkiye (March 30 - April 1, 2006)

• [Fieldwork Team Member / Saha Çalışması Ekip Üyesi] “29 March 2006 Total Solar Eclipse” in Antalya, Türkiye

• [Participant Solar Observer / Güneş Gözlemcisi - Katılımcı] The American Association of Variable Star Observers (AAVSO) (2003 - 2022)

MEMBERSHIPS

• International Astronomical Union (IAU) / Uluslararası Astronomi Birliği (2018 – ongoing) [link] :
- Member : "Division E Sun and Heliosphere"
- Commission Member : "Commission E2 Solar Activity"
- Commission Member : "Commission C3 History of Astronomy"
- Member : "Executive Committee WG Junior Members"
- Member : "Division C Education, Outreach and Heritage"

• European Astronomical Society (EAS) / Avrupa Astronomi Topluluğu (2019 - ongoing)

• Turkish Astronomical Society / Türk Astronomi Derneği (TAD), Full Member - Asil Üye (2010 - ongoing)

• Turkish Astronomical Society / Türk Astronomi Derneği (TAD), Bogazici University Institution Representative - Boğaziçi Üniversitesi Kurum Temsilcisi - (2019 - ongoing)

• Uzay Havası (Space Weather) Ulusal Eylem Grubu (UHUEG), Founding Member - Kurucu Üye (2007)

Past Memberships / Geçmiş Üyelikler :

• European Geosciences Union (EGU) / Avrupa Yerbilimleri Birliği (2018 - 2020)

• Deutsche Geophysicalische Gesellschaft e.V. (DGG) / Alman Jeofizik Derneği (2012 - 2019)

• American Geophysical Union (AGU) / Amerikan Jeofizik Birliği (2007 - 2012)

• Chamber of Geophysical Engineers of Turkey / Jeofizik Mühendisleri Odası (JFMO) (1996 - 2016)

AWARDS

• The American Association of Variable Star Observers (AAVSO) - "Solar Observer Award" (more than 100 Observations), November 2015
• The American Association of Variable Star Observers (AAVSO) - "Solar Observer Award" (more than 500 Observations), September 2021