The Hub Status, Force-Bearing Mechanism of the Maluku Sea Plate in the Circum-Pacific Tectonic System and the Stress Imbalance Effects After Its Disintegration

As a key intersection node between the Circum-Pacific Tectonic Belt and the Tethys Tectonic Domain, the Maluku Sea Plate is a rare backward double subduction microplate in the world, embedded in an inverted U-shape among the Philippine Sea Plate, Eurasian Plate and Indo-Australian Plate. It is not only an important turning point of the western Pacific plate boundary, but also the core hub and supporting fulcrum of the global Circum-Pacific giant stress transmission chain. Based on plate tectonic theory and the latest seismic observation data, this paper systematically clarifies the tectonic location value of the Maluku Sea Plate, analyzes the physical and mechanical mechanisms of convergence, compression and subduction of surrounding plates, focuses on the strong earthquake in the Maluku Sea and its subsequent continuous disintegration process, reveals the stress redistribution law during plate disintegration, evaluates its far-reaching impact on the Circum-Pacific seismic belt and even the global plate dynamic balance, focuses on macro-level seismic risk prediction, and provides theoretical support for high-risk earthquake research and judgment and regional disaster prevention and control.