Articles | Volume 503
https://doi.org/10.5194/piodp-503-1-2025
https://doi.org/10.5194/piodp-503-1-2025
Scientific prospectus
 | 
15 Dec 2025
Scientific prospectus |  | 15 Dec 2025

IODP3 Expedition 503 “Hadal Trench Tsunamigenic Slip History” Scientific Prospectus

Ken Ikehara, Michael Strasser, and Lena Maeda

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Cited articles

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Arai, K., Inoue, T., Ikehara, K., and Sasaki, T.: Episodic subsidence and active deformation of the forearc slope along the Japan Trench near the epicenter of the 2011 Tohoku Earthquake, Earth Planet. Sc. Lett., 408, 9–15, https://doi.org/10.1016/j.epsl.2014.09.048, 2014. 
Ashi, J., Sawada, R., Omura, A., and Ikehara, K.: Accumulation of an earthquake-induced extremely turbid layer in a terminal basin of the Nankai accretional prism, Earth Planets Space, 66, 51, https://doi.org/10.1186/1880-5981-66-51, 2014. 
Bao, R., Strasser, M., McNichol, A. P., Haghipour, N., McIntyre, C., Wefer, G., and Eglinton, T. I.: Tectonically-triggered sediment and carbon export to the hadal zone, Nat. Commun., 9, 121, https://doi.org/10.1038/s41467-017-02504-1, 2018. 
Barbot, S.: Frictional and structural controls of seismic super-cycles at the Japan trench, Earth Planet Space, 72, 63, https://doi.org/10.1186/s40623-020-01185-3, 2020. 
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Short summary
Unexpected shallow and large slip on the plate boundary fault during the 2011 Tōhoku-oki earthquake contributed to a large tsunami. However, our knowledge on the past history of such slips is limited due to the long recurrence interval of the events. IODP3 Expedition 503 recovers the whole trench-fill sequence in the central Japan Trench to understand the nature and recurrence of hadal trench tsunamigenic slips and their earthquake-related carbon accumulation and element cycles.
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