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Expeditions
Expedition 503
Sendai
Hadal Trench Tsunamigenic Slip History
The 2011 – Mw 9.0 – Tohoku-oki earthquake and tsunami was a catastrophic geological event with major societal consequences. Unexpected shallow and large coseismic slip contributed to the large tsunami. Short historical and even shorter instrumental records limit our perspective…
Expedition 507
Late Cenozoic Glaciers, LAndscapes, Climates, and Ecosystems of the North Sea
Intensification of global glacial-interglacial cycles, marked by the onset of the Pleistocene (~2.6 Ma), was a critical climate transition as progressively more severe cold conditions triggered continental-scale Northern Hemisphere glaciation. While the last glacial cycle is increasingly well-understood, prior glaciations…
Expedition 505S
ENIGMA: Exploration into a Global Early Miocene Anomaly
The Miocene Epoch (23.03–5.33 Ma) was a pivotal period of climate and biosphere evolution, yet the early Miocene (23–17 Ma) remains poorly understood due to a scarcity of high-resolution records. Recent studies suggest that around 19 Ma, a major but…
Expedition 504S
The Volcanic Ash Record from the Ontong Java Plateau Ontong Java Plateau: testing models of subduction reversal and wind transport in the western equatorial Pacific
The Ontong Java Plateau (OJP) is the largest oceanic plateau in the world. Collision of the OJP with a trench north of the Solomon Islands arc resulted in congested subduction, and the initiation of new subduction on the southern flank…
Expedition 502
Sendai
Impact of Petit-Spot Magmatism on Subduction Zone Seismicity and Global Geochemical Cycles
International Ocean Drilling Programme (IODP3) Expedition 502 plans to drill the outer rise area of the Japan Trench, where the sediment layer above the acoustic basement is unusually thin. There is a hypothesis that this thin sediment is caused by…
Expedition 502E
Shimizu
Extended Monitoring and Resurveying of Japan Trench Borehole Observatories
Engineering expedition IODP3 Expedition 502E aims to test key hypotheses about the long-term hydrogeologic and mechanical evolution of the Japan Trench megathrust by redeploying temperature sensor strings in observatory Holes C0019D and C0019Q and conducting surveys of downhole deformation. Specifically,…
Expedition 501
Bridgeport
New England Shelf Hydrogeology (Joint IODP3-NSF Expedition)
Coastal hydrological systems provide significant freshwater to coastal communities around the world, and the offshore component of these systems is poorly understood. While volumetrically significant, onshore-offshore freshened water is also susceptible to contamination due to rising sea level. To date,…