Publications
Submitted papers
Sandanbata, O., Trapdoor Faulting at Submarine Calderas—Atypical in earthquakes and tsunamis, but common in volcanic calderas— (in Japanese), Japansese Journal “Zisin”, Seismological Society of Japan.（submitted on February 18, 2026)
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Peer-reviewed papers
Sandanbata, O., & Takemura, S. (2025). Full‐spectrum similarity of repeating trapdoor faulting. Geophysical Research Letters, 52(24), e2025GL119615. https://doi.org/10.1029/2025gl119615 [Summary]
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Sandanbata, O., & Saito, T. (2024b). Segmented Trapdoor Fault in Kita-Ioto Caldera, Japan: Insights From Millimeter Tsunami Waves Captured by an Array Network of Ocean Bottom Pressure Gauges. Journal of Geophysical Research: Solid Earth, 129(12), e2024JB029755. https://doi.org/10.1029/2024JB029755 [Summary]
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Takemura, S., Kubota, T., & Sandanbata, O. (2024). Successive tsunamigenic events near Sofu Seamount inferred from high-frequency teleseismic P and regional T waves. Journal of Geophysical Research: Solid Earth, 129, e2024JB029746. https://doi.org/10.1029/2024JB029746 [Summary]
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Kubota, T., Sandanbata, O., Saito, T., & Matsuzawa, T. (2024). Accelerating seafloor uplift of submarine caldera near Sofugan volcano, Japan, resolved by distant tsunami recordings. Geophysical Research Letters, 51(12). https://doi.org/10.1029/2024gl108415
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Sandanbata, O., Satake, K., Takemura, S., Watada, S., Maeda, T., & Kubota, T. (2024). Enigmatic tsunami waves amplified by repetitive source events near Sofugan volcano, Japan. Geophysical Research Letters, 51, e2023GL106949. https://doi.org/10.1029/2023GL106949
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Sandanbata, O., & Saito, T. (2024a). Quantifying magma overpressure beneath a submarine caldera: A mechanical modeling approach to tsunamigenic trapdoor faulting near Kita-Ioto Island, Japan. Journal of Geophysical Research: Solid Earth, 129, e2023JB027917. https://doi.org/10.1029/2023JB027917 [Summary]
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Sandanbata, O., Watada, S., Satake, K., Kanamori, H., & Rivera, L. (2023). Two volcanic tsunami events caused by trapdoor faulting at a submerged caldera near Curtis and Cheeseman Islands in the Kermadec Arc. Geophysical Research Letters, 50, e2022GL101086. https://doi.org/10.1029/2022GL101086
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Sandanbata, O., Watada, S., Satake, K., Kanamori, H., Rivera, L., & Zhan, Z. (2022). Sub-decadal volcanic tsunamis due to submarine trapdoor faulting at Sumisu caldera in the Izu–Bonin Arc. Journal of Geophysical Research: Solid Earth, 127, e2022JB024213. https://doi.org/10.1029/2022JB024213 [Summary]
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Kubo, H., Kubota, T., Suzuki, W., Aoi, S., Sandanbata, O., Chikasada, N., & Ueda, H. (2022). Ocean-wave phenomenon around Japan due to the 2022 Tonga eruption observed by the wide and dense ocean-bottom pressure gauge networks. Earth Planets Space, 74, 104. https://doi.org/10.1186/s40623-022-01663-w
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Kubota, T., Saito, T., Chikasada, N. Y., & Sandanbata, O. (2021). Meteotsunami observed by the deep-ocean seafloor pressure gauge network off northeastern Japan, Geophysical Research Letters, 48(21) e2021GL094255. https://doi.org/10.1029/2021GL094255
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Lai, V. H., Zhan, Z., Brissaud, Q., Sandanbata, O., & Miller, M. S. (2021). Inflation and Asymmetric Collapse at Kilauea Summit during the 2018 Eruption from Seismic and Infrasound Analyses, Journal of Geophysical Research: Solid Earth, 126(10), e2021JB022139. https://doi.org/10.1029/2021JB022139
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Sandanbata, O., Kanamori, H., Rivera, L., Zhan, Z., Watada, S., & Satake, K. (2021). Moment tensors of ring-faulting at active volcanoes: Insights into vertical-CLVD earthquakes at the Sierra Negra caldera, Galápagos Islands, Journal of Geophysical Research: Solid Earth, 126(6), e2021JB021693. https://doi.org/10.1029/2021JB021693
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Sandanbata, O., Watada, S., Ho, T-C., & Satake, K. (2021). Phase delay of short-period tsunamis in the density-stratified compressible ocean over the elastic Earth, Geophysical Journal International, 226(3), 1975–1985. https://doi.org/10.1093/gji/ggab192
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Saito, T., Kubota, T., Chikasada, N. Y., Tanaka, Y., & Sandanbata, O. (2021). Meteorological tsunami generation due to sea-surface pressure change: Three-dimensional theory and synthetics of ocean-bottom pressure change, Journal of Geophysical Research: Oceans, 126(5), e2020JC017011. https://doi.org/10.1029/2020JC017011
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Heidarzadeh, M., Ishibe, T., Sandanbata O., Muhari, A., & Wijanarto, A. B. (2020). Numerical modeling of the subaerial landslide source of the 22 December 2018 Anak Krakatoa volcanic tsunami, Indonesia, Ocean Engineering, 195, 106733. https://doi.org/10.1016/j.oceaneng.2019.106733
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Wang, Y., Satake, K., Sandanbata, O., Maeda, T., & Su, H. (2019). Tsunami data assimilation of cabled ocean bottom pressure records for the 2015 torishima volcanic tsunami earthquake, Journal of Geophysical Research: Solid Earth, 124(10), 10413-10422. https://doi.org/10.1029/2019JB018056
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Sandanbata, O., Shiobara, H., Kusumoto, S., Kim, H. J., Oba, A., Liu, Q., Ueda, T., Ogawa, M., Takano, K., Kotobuki, I., & Wang, Y. (2018). Equipment of Miniature Instruments to Measure Tsunami Waves in an Experimental Tank (in Japanese), Technical Research Report, Earthquake Research Institute, the University of Tokyo, 24, 29-34. http://www.eri.u-tokyo.ac.jp/GIHOU/archive/24_029-034.pdf
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Sandanbata, O., Watada, S., Satake, K., Fukao, Y., Sugioka, H., Ito, A., & Shiobara, H. (2018). Ray Tracing for Dispersive Tsunamis and Source Amplitude Estimation Based on Green’s Law: Application to the 2015 Volcanic Tsunami Earthquake Near Torishima, South of Japan, Pure and Applied Geophysics, 175, 1371–1385. https://doi.org/10.1007/s00024-017-1746-0
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Fukao, Y., Sandanbata, O., Sugioka, H., Ito, A., Shiobara, H., Watada, S., & Satake, K. (2018). Mechanism of the 2015 volcanic tsunami earthquake near Torishima, Japan. Science Advances, 4(4), eaao0219. https://doi.org/10.1126/sciadv.aao0219
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Sandanbata, O., Obara, K., Maeda, T., Takagi, R., & Satake, K. (2015). Sudden changes in the amplitude‐frequency distribution of long‐period tremors at Aso volcano, southwest Japan, Geophysical Research Letters, 42, 10,256–10,262. https://doi.org/10.1002/2015GL066443
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