Geology of Indonesia active volcanoes formed Sumatra, Java, Bali, and Nusa Tenggara islands, most of which, particularly Java and Bali, emerged within the last 2–3 million years. The Pacific and Australian plate movements controlled the tectonics of the eastern portion of Indonesia. The tectonics processes in Indonesia formed major structures in Indonesia. The most prominent fault in the west of Indonesia is the Semangko Fault or the Great Sumatran Fault, a dextral strike-slip fault along Sumatra Island (about 1900 km). The formation of this fault zone is related to the subduction zone in the west of Sumatra. Palu-Koro fault is another major structural
Australia–Indonesia relations employed as professional, clerical or administrative workers, or as labourers. According to the 2001 Australian census, 42.9% of Indonesian-born people living in Australia resided in New South Wales, followed by 24.7% in Victoria, 15.5% in Western Australia, and 10.4% in Queensland. 40.7% listed their ancestry as Chinese, 39.8% as Indonesian, and 7.2% as Dutch. Statistics Indonesia does not measure the number of Australian residents in Indonesia, however tourist arrivals indicate that 931,109 Australians visited Indonesia in 2011. According to research conducted in 2009 by Bank Indonesia, there were approximately 45,384 foreigners working in Indonesia, of whom 5% (or 2,209) were