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China-Indonesia joint geological and geophysical scientific expedition concluded successfully.
Date：2025-08-11
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On August 26, the first joint geological and geophysical expedition, organized jointly by the SIO and the National Research and Innovation Agency of Indonesia, concluded successfully. The expedition yielded fruitful results in the exploration of the deep structure of the Java subduction zone.
The expedition lasted for 17 days, covering a total voyage of approximately 2,800 nautical miles. A joint active-source seismic and controlled-source electromagnetic survey was carried out in the Java Trench subduction zone area. Meanwhile, seawater and sediment core samples were collected, and relevant scientific data were obtained. Chinese and Indonesian scientists worked closely together during the operation, achieving a 100% recovery of seabed observation equipment in the limited weather window.
Researcher Ding Weiwei, Project Chief Scientist and Deputy Director of the State Key Laboratory of Submarine Geoscience, stated that the mantle-crust scale seismic and electromagnetic data obtained from the Java Trench subduction zone during this joint expedition will provide crucial evidence for a deeper understanding of the lithospheric solid-fluid structure and dynamic processes in the Java subduction zone. Next, the SIO will collaborate closely with the National Research and Innovation Agency of Indonesia, Gadjah Mada University, and other research institutions and universities in subsequent data processing, scientific analysis and other aspects, enhancing scientific understanding of the development of plate convergence theory in the Southeast Asian curved subduction system and the mechanisms of marine geological hazards.
