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The geography of Indonesia is dominated by volcanoes that are formed due to subduction zones between the Eurasian plate and the Indo-Australian plate. Volcanoes in Indonesia are part of the Pacific Ring of Fire. The 150 entries in the list below are grouped into six geographical regions, four of which belong to the volcanoes of the Sunda Arc trench system. The remaining two groups are volcanoes of Halmahera, including its surrounding volcanic islands, and volcanoes of Sulawesi and the Sangihe Islands. The latter group is in one volcanic arc together with the Philippine volcanoes. The most active volcanoes are Kelut and Merapi on Java island which have been responsible for thousands of deaths in the region. Since AD 1000, Kelut has erupted more than 30 times, of which the largest eruption was at scale 5 on the Volcanic Explosivity Index (VEI), while Mount Merapi has erupted more than 80 times. The International Association of Volcanology and Chemistry of the Earth's Interior has named Mount Merapi as a Decade Volcano since 1995 because of its high volcanic activity. In 2012, Indonesia has 127 active volcanoes with about 5 million people have activities within the danger zone. The earthquake and tsunami event of 26 December 2004 is thought to bring disruption to the volcanoes' eruption pattern. The 2010 eruption of Mount Sinabung, which has no recorded eruption since the 1600s, is presented as one possible example of the hypothesis.〔(【引用サイトリンク】title=Indonesia Miliki 127 Gunung Api Aktif )〕 The word for ''Mount'' in Indonesian and many regional languages of the country (such as Javanese) is ''Gunung''. Thus, Mount Merapi for example, is referred to as ''Gunung Merapi'' in Indonesian and also in some English-based sites. ==Scope== There is no single standard definition for a volcano. It can be defined from individual vents, volcanic edifices or volcanic fields. Interior of ancient volcanoes may have been eroded, creating a new subsurface magma chamber as a separate volcano. Many contemporary active volcanoes rise as young parasitic cones from flank vents or at a central crater. Some volcanic cones are grouped into one volcano name, for instance, the Tengger caldera complex, although individual vents are named by local people. The status of a volcano, either active or dormant, cannot be defined precisely. An indication of a volcano is determined by either its historical records, radiocarbon dating, or geothermal activities. The primary source of the list below is taken from the "Volcanoes of the World" book, compiled by two volcanologists Tom Simkin and Lee Siebert, in which active volcanoes in the past 10,000 years (Holocene) are listed. Particularly for Indonesia, Simkin and Siebert used a catalogue of active volcanoes from the International Association of Volcanology and Chemistry of the Earth's Interior publication series. The Simkin and Siebert list is the most complete list of volcanoes in Indonesia, but the accuracy of the record varies from one region to another in terms of contemporary activities and fatalities in recent eruptions. Complementary sources for the latest volcanic data are taken from the Volcanological Survey of Indonesia, a governmental institution which is responsible for volcanic activities and geological hazard mitigation in Indonesia, and some academic resources. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「List of volcanoes in Indonesia」の詳細全文を読む スポンサード リンク
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