Summary
The point of convergence of the Eurasian, Philippine and Australian plates is situated adjacent to the island of Sulawesi, Indonesia. The relative plate velocities are estimated by NUVEL1 to be 7 to 9 cm yr− 1. The complex tectonic mechanism of the triple junction has been studied over a two‐year period in the course of the GEODYSSEA Southeast Asian Project. The GPS investigations concentrate on measurements of both the Sulawesi (eastern Indonesia) part of the inter‐regional GEODYSSEA network and a local subnetwork on Sulawesi. Motions derived using data from the subnetwork confirm what the results of the inter‐regional GEODYSSEA network have suggested; that is, that current deformation is high, and there are distinct deformation domains in the study area on Sulawesi. The tectonic mechanism of the triple junction has been analysed using a rigid microblock model. The triple junction area can best be interpreted as a headland of the Australian Plate deflected by its collision with the Philippine Plate, thereby identifying the driving forces of the current deformation. The northern part is dominated by the Sula domain, which shows clockwise rotation. To the south, it is connected to the Australian Plate by an ensemble of microblocks undergoing counter‐clockwise rotation. In addition to the above, our tectonic model permits the determination of the local influence of two large earthquakes (M=7.8, 1996 January 1 and M=7.0, 1996 July 22) on the motion of the station Tomini (north Sulawesi). More observations and a denser GPS network are planned in order to study the behaviour of the Palu‐Koro Fault, the main fault on the western limit of the Sula block.
Indonesia and Japan have experienced hydrometeorological disasters, primarily floods disasters every year. The two countries must experience few losses due to improper disaster management. However, along with the times, Japan, an expert in technology development, can reduce flood risk. Japan has established itself as a country that is an example for countries in disaster risk reduction. The Japanese government promotes a concept, namely "Build Back Better" to build a post-disaster area to restore the area to its original state and take opportunities to develop better than before. Meanwhile, Indonesia, a developing country incidentally, is still trying to reduce the risk of flood disasters that cause considerable losses to the nation. Therefore, this study aims to analyze the lessons learned from Japan for flood risk reduction in Indonesia. This study uses a qualitative descriptive method with data collection techniques through Focus Group Discussions (FGD) with professors and researchers from Japan and reviewing disaster risk reduction documents. The results of this study indicate that there are several keys to success that Japan has in reducing flood risk, such as a) a mindset to be able to make disasters a challenge for the better; b) policies and disaster management systems structure from the center to the regions; c) encourage the development of SETI (Science, Engineering, Technology, and Innovation) for disaster risk reduction to many sectors; and d) Japan's ambition in implementing Society 5.0 which is relevant to Disaster Risk Management (DRM).
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