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
Christianity in Indonesia the second-smallest number of Christians (22,756) or 0.1% of Christians within Indonesia. Slightly larger concentrations are found in Mataram, and Bima cites, both with just 2% Christians. Among Indonesian provinces in 2010, East Nusa Tenggara had the highest percentage (among religions reported in the province) of Christians (88.88%), including the highest percentage of Catholics (54.14%) and the fifth-highest percentage of Protestants (34.74%). East Nusa Tenggara also reported the highest total number of Christians (4.16 million) or 17.8% of Christians within Indonesia. The mix of religions and denominations varies significantly from area to area. Sumba island has a Catholic majority in