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
Indonesia traditional sports in Indonesia. In areas with a history of tribal warfare, mock fighting contests are held, such as "caci" in Flores and "pasola" in Sumba. "Pencak Silat" is an Indonesian martial art and in 1987, became one of the sporting events in Southeast Asian Games, with Indonesia appearing as one of the leading forces. In Southeast Asia, Indonesia is one of the major sport powerhouses by winning the Southeast Asian Games 10 times since 1977, most recently in 2011. Government General Indonesia Indonesia ( , ; Indonesian: ), officially the Republic of Indonesia ( ), is a country in