Journals / Türkiye Uzaktan Algılama Dergisi / 2026 / Volume: 8

Accuracy of 3D geodetic model for trench-based paleoseismology: A case study from the Gelenbe fault zone

Furkan Şahiner(AFYON KOCATEPE ÜNİVERSİTESİ, FEN BİLİMLERİ ENSTİTÜSÜ, HARİTA MÜHENDİSLİĞİ (YL) (TEZLİ))0000-0002-1679-2204
İbrahim Tiryakioğlu(AFYON KOCATEPE ÜNİVERSİTESİ, MÜHENDİSLİK FAKÜLTESİ, HARİTA MÜHENDİSLİĞİ BÖLÜMÜ, HARİTA MÜHENDİSLİĞİ PR.)0000-0002-4954-7109
Halil İbrahim Solak(AFYON KOCATEPE ÜNİVERSİTESİ, UZAKTAN EĞİTİM MESLEK YÜKSEKOKULU)0000-0001-5286-0369
Çağlar Özkaymak(AFYON KOCATEPE ÜNİVERSİTESİ, MÜHENDİSLİK FAKÜLTESİ, JEOLOJİ MÜHENDİSLİĞİ BÖLÜMÜ, JEOLOJİ MÜHENDİSLİĞİ PR.)0000-0002-0377-1324
Doğukan Mert Özcan(AFYON KOCATEPE ÜNİVERSİTESİ, FEN BİLİMLERİ ENSTİTÜSÜ, JEOLOJİ MÜHENDİSLİĞİ (DR))0000-0002-2693-0789
Volkan Karabacak(ESKİŞEHİR OSMANGAZİ ÜNİVERSİTESİ, MÜHENDİSLİK-MİMARLIK FAKÜLTESİ, JEOLOJİ MÜHENDİSLİĞİ BÖLÜMÜ, JEOLOJİ MÜHENDİSLİĞİ PR.)0000-0003-2581-7984
Ökmen Sümer(DOKUZ EYLÜL ÜNİVERSİTESİ, MÜHENDİSLİK FAKÜLTESİ, JEOLOJİ MÜHENDİSLİĞİ BÖLÜMÜ, JEOLOJİ MÜHENDİSLİĞİ PR.)0000-0003-3168-8728
Pages
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Publication Date
2026-07-03
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

To determine the impact of this spatial error on seismotectonic interpretations, different displacement scenarios were tested, and the results demonstrated that the ±17 mm model error caused a negligible deviation of only ±0.02 magnitude in the calculated moment magnitudes.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In recent years, the rapidly advancing Light Detection and Ranging (LiDAR) technology has become an important tool in geosciences, particularly in paleoseismology, due to its ability to provide highly accurate topographic data.
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Key Findings & Data:In this study, trench-based paleoseismological investigations were conducted at two different locations along the Gelenbe Fault Zone within the İzmir–Balıkesir Transfer Zone (İBTZ), as part of the project titled “Determination of the Paleoseismological Characteristics of Active Faults in Turkey” (Project No: 123G020).
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Conclusion & Impact:To determine the impact of this spatial error on seismotectonic interpretations, different displacement scenarios were tested, and the results demonstrated that the ±17 mm model error caused a negligible deviation of only ±0.02 magnitude in the calculated moment magnitudes.
🔬Design:Lab & Field Experiment
📍Scope:Comprehensive Sample
⚙️Variables:Gelenbe fault zone · LiDAR · Palaeoseismology

Abstract

In recent years, the rapidly advancing Light Detection and Ranging (LiDAR) technology has become an important tool in geosciences, particularly in paleoseismology, due to its ability to provide highly accurate topographic data. In this study, trench-based paleoseismological investigations were conducted at two different locations along the Gelenbe Fault Zone within the İzmir–Balıkesir Transfer Zone (İBTZ), as part of the project titled “Determination of the Paleoseismological Characteristics of Active Faults in Turkey” (Project No: 123G020). Gelenbe Fault Zone is a right-lateral strike-slip fault extending approximately in a NNE–SSW direction between Bigadiç (Balıkesir) and Akhisar (Manisa). Within the zone, the East and West Segments, measuring 35 km and 36 km in length respectively, are approximately parallel to each other. Within the scope of the study, the trench walls excavated across the fault were cleaned, gridded at one-meter intervals, and subsequently scanned using LiDAR technology to obtain high-resolution data. The acquired point clouds were integrated with photogrammetric data and modeled in three dimensions using Agisoft Metashape Professional and CloudCompare software. To evaluate the geometric accuracy of the model, the one-meter grids marked on the trench walls were used as reference points, and the root mean square error was calculated. The analyses revealed that the model’s accuracy value was ±17 mm, consistent with results obtained by similar methods in the literature. To determine the impact of this spatial error on seismotectonic interpretations, different displacement scenarios were tested, and the results demonstrated that the ±17 mm model error caused a negligible deviation of only ±0.02 magnitude in the calculated moment magnitudes. These findings demonstrate the applicability of LiDAR technology for producing high-accuracy Three-Dimensional models in paleoseismological studies and provide a valuable example for preserving refilled trenches as permanent digital archives

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Cite This Article

Şahiner, F., Tiryakioğlu, İ., Solak, H. İ., Özkaymak, Ç., Özcan, D. M., Karabacak, V., Sümer, Ö. (2026). Accuracy of 3D geodetic model for trench-based paleoseismology: A case study from the Gelenbe fault zone. Türkiye Uzaktan Algılama Dergisi, Volume: 8. https://doi.org/10.51489/tuzal.1835652

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