[S-TT48] Advancing Earth Science through Fiber Optic Sensing Techniques and Integrated Analysis

Thu. May 28, 2026 5:15 PM - 7:00 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

Fiber optic sensing is revolutionizing Earth science by transforming telecommunication cables into dense, multipurpose sensor arrays. Techniques such as Distributed Acoustic/Strain Sensing (DAS/DSS) and Distributed Temperature Sensing (DTS) provide unprecedented spatial resolution for monitoring vibration, strain, and temperature, enabling high-fidelity observations that surpass conventional point measurements in seismology, geodesy, and volcanology. However, significant challenges remain in the integrated analysis of this novel strain data with traditional seismic (velocity/acceleration) and geodetic measurements, as well as in the technical difficulty of maintaining a high signal-to-noise ratio over long-distance cables. This session invites contributions that address such challenges and advance the use of fiber optic sensing. We seek presentations on innovative observation strategies for both on-shore and off-shore environments; novel data analysis methods, including machine learning for handling massive datasets; and compelling case studies that deepen our understanding of earthquakes, volcanoes, and tectonics. The goal is to foster collaboration to overcome current hurdles and pioneer the next generation of integrated seismic and geodetic observation networks, thereby fully unlocking the potential of fiber optic technologies to reveal new insights into Earth science.

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5:15 PM - 7:00 PM

[STT48-P01] Seismic Monitoring and S-wave Velocity Structure Analysis of the Hunga Volcano with Distributed Acoustic Sensing on an Active Telecommunication Cable

*Shunsuke Nakao¹, Mie Ichihara¹, Masaru Nakano², Taaniela Kula³, Rennie Vaiomounga⁴, Rebecca Carey⁵, Takao Ohminato¹, Masanao Shinohara¹ (1. Earthquake Research Institute, University of Tokyo, 2. Japan Agency for Marine-Earth Science and Technology, 3. Ministry of Lands and Natural Resources, Government of Tonga, 4. Tonga Geological Services, Government of Tonga, 5. University of Tasmania)

5:15 PM - 7:00 PM

[STT48-P02] Volcanic and seismic monitoring the Izu Islands using DAS via seafloor telecommunication cables

*Masaru Nakano¹, Tomoya Nakajima¹, Eiichiro Araki¹, Shigeaki Ono¹ (1. Japan Agency for Marine-Earth Science and Technology)

5:15 PM - 7:00 PM

[STT48-P03] Vibration Monitoring in the Off-Tonankai Cable by Distributed Acoustic Sensing (3)

*Masayuki Tanaka¹, Kazuhiro Kimura¹, Yasuhiro Yoshida², Naoto Ogawa³, Tsunehisa Kimura⁴, Yutaka OGAWA⁵ (1. Meteorological Research Institute, 2. Meteorological College, 3. OYO Corporation, 4. SINTELA, 5. NK Systems)

5:15 PM - 7:00 PM

[STT48-P04] Relocation of deep low-frequency earthquakes along the Nankai subduction zone using Distributed Acoustic Sensing (DAS)

*Takumi Takahashi¹, Aitaro Kato¹, Masanao Shinohara¹ (1. Earthquake Research Institute, University of Tokyo)

5:15 PM - 7:00 PM

[STT48-P05] Distributed strain sensing along a fiber optic cable in the Noto Peninsula using Rayleigh Frequency Acoustic and Strain (RFAS) technology

*Masatoshi Miyazawa¹, Eiichiro Araki², Takashi Yokobiki², Masayuki Suzuki², Masahiro Yoshikawa¹ (1. Disaster Prevention Research Institute, Kyoto University, 2. Japan Agency for Marine-Earth Science and Technology)

5:15 PM - 7:00 PM

[STT48-P06] Detection of S-Wave Reflectors in the Lower Crust in the Oku-Noto Region using DAS Records

*Tomomitsu Hamano¹, Masatoshi Miyazawa¹, Eiichiro Araki², Yoshiyuki Tanaka³ (1. Kyoto University, 2. JAMSTEC, 3. University of Tokyo)

5:15 PM - 7:00 PM

[STT48-P07] Estimation of seismic velocity structure between Makurazaki and Takeshima, Japan, using Distributed Acoustic Sensing (DAS)

*Akari Baba¹, Kentaro Emoto¹, Masaru Nakano², Tomoya Nakajima², Eiichiro Araki², Shigeaki Ono², Hiroko Sugioka³ (1. Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University, 2. Japan Agency for Marine-Earth Science and Technology, 3. Kobe Ocean-Bottom Exploration Center, Kobe University)

5:15 PM - 7:00 PM

[STT48-P08] DAS-VSP field experiment using Portable Active Seismic Source (PASS)

*Toshinori Kimura¹, Shibo Xu¹, Takeshi Tsuji², Arata Kioka², Roman Pevzner³, Roman Isaenkov³, Boris Gurevich³, Akihisa Takahashi⁴, Masatoshi Nomura⁴, Tomoyuki Iwamoto⁴ (1. ENEOS Xplora Inc., 2. The University of Tokyo, 3. Curtin University , 4. Wavelet, Inc.)

5:15 PM - 7:00 PM

[STT48-P09] A workflow for synthetic DAS data generation

Giacomo Rapagnani¹, Guglielmo Vullo¹, Emanuele Bozzi¹, Giulio Pascucci¹, Roberto Fontana¹, Davide Pecci², *Francesco Grigoli¹ (1. University of Pisa, 2. Seismix srl)

5:15 PM - 7:00 PM

[STT48-P10] Experiments on Detecting Railway Rockfalls, Pedestrian Intrusions, and Loading Events with Distributed Acoustic Sensing

*Hiroaki Yamahana¹, Satoshi Katakami¹, Shoichi Kawamura¹, Toru Gondo¹, Shota Kato¹ (1. Railway Technical Research Institute)

5:15 PM - 7:00 PM

[STT48-P11] Experimental Evaluation of DAS under Strong Shaking and Interpretation of Observed Strain Signals via Internal Cable Modeling

*Satoshi Katakami¹, Masahiro Korenaga¹ (1. Railway Technical Research Institute)

Session information

[S-TT48] Advancing Earth Science through Fiber Optic Sensing Techniques and Integrated Analysis

[STT48-P01] Seismic Monitoring and S-wave Velocity Structure Analysis of the Hunga Volcano with Distributed Acoustic Sensing on an Active Telecommunication Cable

[STT48-P02] Volcanic and seismic monitoring the Izu Islands using DAS via seafloor telecommunication cables

[STT48-P03] Vibration Monitoring in the Off-Tonankai Cable by Distributed Acoustic Sensing (3)

[STT48-P04] Relocation of deep low-frequency earthquakes along the Nankai subduction zone using Distributed Acoustic Sensing (DAS)

[STT48-P05] Distributed strain sensing along a fiber optic cable in the Noto Peninsula using Rayleigh Frequency Acoustic and Strain (RFAS) technology

[STT48-P06] Detection of S-Wave Reflectors in the Lower Crust in the Oku-Noto Region using DAS Records

[STT48-P07] Estimation of seismic velocity structure between Makurazaki and Takeshima, Japan, using Distributed Acoustic Sensing (DAS)

[STT48-P08] DAS-VSP field experiment using Portable Active Seismic Source (PASS)

[STT48-P09] A workflow for synthetic DAS data generation

[STT48-P10] Experiments on Detecting Railway Rockfalls, Pedestrian Intrusions, and Loading Events with Distributed Acoustic Sensing

[STT48-P11] Experimental Evaluation of DAS under Strong Shaking and Interpretation of Observed Strain Signals via Internal Cable Modeling

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