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Sumatra is one of the Sunda Islands of western
Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
. It is the largest island that is fully within Indonesian territory, as well as the sixth-largest island in the world at 473,481 km2 (182,812 mi.2), not including adjacent islands such as the
Simeulue Simeulue is an island of Indonesia, off the west coast of Sumatra. It covers an area of 1754 square kilometres (677 square miles), including minor offshore islands. It had a population of 80,674 at the 2010 census and 92,865 at the 2020 census ...
,
Nias Nias ( id, Pulau Nias, Nias language: ''Tanö Niha'') (sometimes called Little Sumatra in English) is an island located off the western coast of Sumatra, Indonesia. Nias is also the name of the archipelago () of which the island is the centre, ...
, Mentawai, Enggano,
Riau Islands The Riau Islands ( id, Kepulauan Riau) is a province of Indonesia. It comprises a total of 1,796 islands scattered between Sumatra, Malay Peninsula, and Borneo including the Riau Archipelago. Situated on one of the world's busiest shipping lan ...
, Bangka Belitung and
Krakatoa archipelago The Krakatoa Archipelago is a small uninhabited archipelago of volcanic islands formed by the Krakatoa stratovolcano located in the Sunda Strait, nestled between the much larger islands of Java and Sumatra. As of 2018, the archipelago consists ...
. Sumatra is an elongated landmass spanning a diagonal northwest–southeast axis. The
Indian Ocean The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or ~19.8% of the water on Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia to the east. To the south it is bounded by t ...
borders the northwest, west, and southwest coasts of Sumatra, with the island chain of
Simeulue Simeulue is an island of Indonesia, off the west coast of Sumatra. It covers an area of 1754 square kilometres (677 square miles), including minor offshore islands. It had a population of 80,674 at the 2010 census and 92,865 at the 2020 census ...
,
Nias Nias ( id, Pulau Nias, Nias language: ''Tanö Niha'') (sometimes called Little Sumatra in English) is an island located off the western coast of Sumatra, Indonesia. Nias is also the name of the archipelago () of which the island is the centre, ...
, Mentawai, and Enggano off the western coast. In the northeast, the narrow
Strait of Malacca The Strait of Malacca is a narrow stretch of water, 500 mi (800 km) long and from 40 to 155 mi (65–250 km) wide, between the Malay Peninsula (Peninsular Malaysia) to the northeast and the Indonesian island of Sumatra to the southwest, connec ...
separates the island from the Malay Peninsula, which is an extension of the Eurasian continent. In the southeast, the narrow Sunda Strait, containing the
Krakatoa Archipelago The Krakatoa Archipelago is a small uninhabited archipelago of volcanic islands formed by the Krakatoa stratovolcano located in the Sunda Strait, nestled between the much larger islands of Java and Sumatra. As of 2018, the archipelago consists ...
, separates Sumatra from
Java Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's mos ...
. The northern tip of Sumatra is near the Andaman Islands, while off the southeastern coast lie the islands of Bangka and Belitung,
Karimata Strait The Karimata Strait (alternatively, Carimata or Caramata; id, Selat Karimata) is a wide strait that connects the South China Sea to the Java Sea, separating the Indonesian islands of Belitung to the west and Borneo (Kalimantan) to the east. It ...
and the Java Sea. The
Bukit Barisan The Bukit Barisan or the Barisan Mountains are a mountain range on the western side of Sumatra, Indonesia, covering nearly 1,700 km (1,050 mi) from the north to the south of the island. The Bukit Barisan range consists primarily of v ...
mountains, which contain several active volcanoes, form the backbone of the island, while the northeastern area contains large plains and lowlands with swamps, mangrove forest and complex river systems. The equator crosses the island at its centre in
West Sumatra West Sumatra ( id, Sumatra Barat) is a province of Indonesia. It is located on the west coast of the island of Sumatra and includes the Mentawai Islands off that coast. The province has an area of , with a population of 5,534,472 at the 2020 cen ...
and
Riau Riau is a province of Indonesia. It is located on the central eastern coast of Sumatra along the Strait of Malacca. The province shares land borders with North Sumatra to the northwest, West Sumatra to the west, and Jambi to the south. Acco ...
provinces. The climate of the island is
tropical The tropics are the regions of Earth surrounding the Equator. They are defined in latitude by the Tropic of Cancer in the Northern Hemisphere at N and the Tropic of Capricorn in the Southern Hemisphere at S. The tropics are also referred to ...
, hot, and humid. Lush
tropical rain forest Tropical rainforests are rainforests that occur in areas of tropical rainforest climate in which there is no dry season – all months have an average precipitation of at least 60 mm – and may also be referred to as ''lowland equatori ...
once dominated the landscape. Sumatra has a wide range of plant and animal species but has lost almost 50% of its tropical rainforest in the last 35 years. Many species are now critically endangered, such as the Sumatran ground cuckoo, the Sumatran tiger, the
Sumatran elephant The Sumatran elephant (''Elephas maximus sumatranus'') is one of four recognized subspecies of the Asian elephant, and native to the Indonesian island of Sumatra. In 2011, IUCN upgraded the conservation status of the Sumatran elephant from endang ...
, the
Sumatran rhinoceros The Sumatran rhinoceros (''Dicerorhinus sumatrensis''), also known as the Sumatran rhino, hairy rhinoceros or Asian two-horned rhinoceros, is a rare member of the family Rhinocerotidae and one of five extant species of rhinoceros. It is the o ...
, and the Sumatran orangutan.
Deforestation Deforestation or forest clearance is the removal of a forest or stand of trees from land that is then converted to non-forest use. Deforestation can involve conversion of forest land to farms, ranches, or urban use. The most concentrated ...
on the island has also resulted in serious seasonal smoke haze over neighbouring countries, such as the
2013 Southeast Asian haze The 2013 Southeast Asian haze was a haze crisis that affected several countries in Southeast Asia, including Brunei, Indonesia, Malaysia, Singapore and Southern Thailand, mainly during June and July 2013. The haze period was caused by large- ...
which caused considerable tensions between Indonesia and affected countries
Malaysia Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two r ...
and
Singapore Singapore (), officially the Republic of Singapore, is a sovereign island country and city-state in maritime Southeast Asia. It lies about one degree of latitude () north of the equator, off the southern tip of the Malay Peninsula, bor ...
.


Etymology

Sumatra was known in ancient times by the
Sanskrit Sanskrit (; attributively , ; nominally , , ) is a classical language belonging to the Indo-Aryan branch of the Indo-European languages. It arose in South Asia after its predecessor languages had diffused there from the northwest in the late ...
names of ('Island of Gold') and ('Land of Gold'), because of the gold deposits in the island's
highlands Highland is a broad term for areas of higher elevation, such as a mountain range or mountainous plateau. Highland, Highlands, or The Highlands, may also refer to: Places Albania * Dukagjin Highlands Armenia * Armenian Highlands Australia *Sou ...
. The earliest known mention of the current form "Sumatra" was in 1017, when the
local Local may refer to: Geography and transportation * Local (train), a train serving local traffic demand * Local, Missouri, a community in the United States * Local government, a form of public administration, usually the lowest tier of administrat ...
king Haji Sumatrabhumi ("king of the land of Sumatra") sent an envoy to China.
Arab The Arabs (singular: Arab; singular ar, عَرَبِيٌّ, DIN 31635: , , plural ar, عَرَب, DIN 31635: , Arabic pronunciation: ), also known as the Arab people, are an ethnic group mainly inhabiting the Arab world in Western Asia, ...
geographers referred to the island as ('' Lamuri'', ''Lambri'' or ''Ramni'') in the tenth through thirteenth centuries, in reference to a kingdom near modern-day Banda Aceh which was the first landfall for traders. The island has also been known by other names, including ''Andalas'' or ''Percha Island''. In the late 13th century, Marco Polo referred to the kingdom as , while his contemporary fellow Italian traveller
Odoric of Pordenone Odoric of Pordenone, OFM (1286–1331), also known as Odorico Mattiussi/Mattiuzzi, Odoricus of Friuli or Orderic of Pordenone, was an Italian late-medieval Franciscan friar and missionary explorer. He traveled through India, the Greater Sunda Is ...
used the form . Later in the 14th century the local form "Sumatra" became popular abroad due to the rising power of the kingdom of
Samudera Pasai The Samudera Pasai Sultanate (), also known as Samudera or Pasai or Samudera Darussalam or Pacem, was a Muslim harbour kingdom on the north coast of Sumatra from the 13th to the 16th centuries CE. The kingdom was believed to have been founded ...
and the subsequent
Sultanate of Aceh The Sultanate of Aceh, officially the Kingdom of Aceh Darussalam ( ace, Keurajeuën Acèh Darussalam; Jawoë: كاورجاون اچيه دارالسلام), was a sultanate centered in the modern-day Indonesian province of Aceh. It was a major ...
. From then on, subsequent European writers mostly used ''Sumatra'' or similar forms of the name for the entire island.


History

By the year
692 __NOTOC__ Year 692 (Roman numerals, DCXCII) was a leap year starting on Monday (link will display the full calendar) of the Julian calendar. The denomination 692 for this year has been used since the early medieval period, when the Anno Domini ...
, the
Melayu Kingdom The Melayu Kingdom (also known as Malayu, Dharmasraya Kingdom or the Jambi Kingdom; , reconstructed Middle Chinese pronunciation ''mat-la-yu kwok'')Muljana, Slamet , (2006), ''Sriwijaya'', Yogyakarta: LKIS, . was a classical Buddhist kingdom l ...
was absorbed by Srivijaya. Srivijaya influence waned in the 11th century year 1025 after being defeated by the Chola Empire in southern India. By the end of the 12th century Srivijaya had been reduced to a small kingdom, and its dominant role in South Sumatra with the last king ratu Sekekhummong. At the same time, the spread of Islam in Indonesia occurred gradually and indirectly, starting from the western regions of Indonesia such as the Sumatra area which became the first place for the spread of Islam in the archipelago then Java to the eastern regions of Indonesia, Sulawesi and Maluku. The island of Sumatra is also an area in the archipelago that received the spread of Islam first compared to other islands or other areas. The island of Sumatra became the first area to receive the spread of Islam because of the position of the island of Sumatra which is close to the Malacca strait. The initial process of Islamization related to trade and also the formation of the kingdom. Islam entered Sumatra through pious
Arabs The Arabs (singular: Arab; singular ar, عَرَبِيٌّ, DIN 31635: , , plural ar, عَرَب, DIN 31635: , Arabic pronunciation: ), also known as the Arab people, are an ethnic group mainly inhabiting the Arab world in Western Asia, ...
and
Indian Indian or Indians may refer to: Peoples South Asia * Indian people, people of Indian nationality, or people who have an Indian ancestor ** Non-resident Indian, a citizen of India who has temporarily emigrated to another country * South Asia ...
traders in the 6th and 7th centuries AD. At the beginning and end of the 13th century the formation of the kingdom, the king of the
Samudra Samudra (Sanskrit: समुद्र; ) is a Sanskrit term literally meaning the "gathering together of waters" (''-'' "together" and ''-udra'' "water"). It refers to an ocean, sea or confluence. It also forms the name of Samudradeva, the Hindu g ...
kingdom had converted to Islam. Marco Polo visited the island in 1292, and his fellow Italian
Odoric of Pordenone Odoric of Pordenone, OFM (1286–1331), also known as Odorico Mattiussi/Mattiuzzi, Odoricus of Friuli or Orderic of Pordenone, was an Italian late-medieval Franciscan friar and missionary explorer. He traveled through India, the Greater Sunda Is ...
in 1321. Moroccan scholar Ibn Battuta visited with the sultan for 15 days, noting the city of Samudra was "a fine, big city with wooden walls and towers", and another two months on his return journey. Samudra was succeeded by the powerful Aceh Sultanate, which survived to the 20th century. With the coming of the
Dutch Dutch commonly refers to: * Something of, from, or related to the Netherlands * Dutch people () * Dutch language () Dutch may also refer to: Places * Dutch, West Virginia, a community in the United States * Pennsylvania Dutch Country People E ...
, the many Sumatran princely states gradually fell under their control. Aceh, in the north, was the major obstacle, as the Dutch were involved in the long and costly
Aceh War The Aceh War ( id, Perang Aceh), also known as the Dutch War or the Infidel War (1873–1913), was an armed military conflict between the Sultanate of Aceh and the Kingdom of the Netherlands which was triggered by discussions between represen ...
(1873–1903). The
Free Aceh Movement The Free Aceh Movement ( id, Gerakan Aceh Merdeka, GAM; ace, Geurakan Acèh Meurdèka / Gěrakan Aceh Měrdeka) was a separatist group seeking independence for the Aceh region of Sumatra, Indonesia. GAM fought against Indonesian government f ...
fought against Indonesian government forces in the Aceh Insurgency from 1976 to 2005. Security crackdowns in 2001 and 2002 resulted in several thousand civilian deaths. The island was heavily impacted by both the 1883 Krakatoa eruption and the 2004
Boxing Day Tsunami An earthquake and a tsunami, known as the Boxing Day Tsunami and, by the scientific community, the Sumatra–Andaman earthquake, occurred at 07:58:53 local time (UTC+7) on 26 December 2004, with an epicentre off the west coast of northern Sum ...
.


Demographics

Sumatra is not particularly densely populated, with 125 people per km2 – about 59,185,500  people in total (according to official estimates as at mid 2021). Because of its size, it is nonetheless the fifth most populous island in the world. File:Minangprocession.jpg, Minangkabau women carrying platters of food to a ceremony File:House in Nias North Sumatra.jpg, Traditional house in Nias North Sumatra


Ethnic groups

The largest indigenous ethnic groups in Sumatra are Malays, Minangkabaus, Bataks, Acehnese, and Lampungs. Other major non-indigenous ethnic groups are Javanese, Sundanese, and
Chinese Chinese can refer to: * Something related to China * Chinese people, people of Chinese nationality, citizenship, and/or ethnicity **''Zhonghua minzu'', the supra-ethnic concept of the Chinese nation ** List of ethnic groups in China, people of ...
. Below are 11 largest ethnic groups in Sumatra based on 2010 census (including
Riau Islands The Riau Islands ( id, Kepulauan Riau) is a province of Indonesia. It comprises a total of 1,796 islands scattered between Sumatra, Malay Peninsula, and Borneo including the Riau Archipelago. Situated on one of the world's busiest shipping lan ...
, Bangka Belitung,
Nias Nias ( id, Pulau Nias, Nias language: ''Tanö Niha'') (sometimes called Little Sumatra in English) is an island located off the western coast of Sumatra, Indonesia. Nias is also the name of the archipelago () of which the island is the centre, ...
, Mentawai,
Simeulue Simeulue is an island of Indonesia, off the west coast of Sumatra. It covers an area of 1754 square kilometres (677 square miles), including minor offshore islands. It had a population of 80,674 at the 2010 census and 92,865 at the 2020 census ...
and islands around it)


Languages

There are over 52 languages spoken, all of which (except Chinese and Tamil) belong to the
Malayo-Polynesian The Malayo-Polynesian languages are a subgroup of the Austronesian languages, with approximately 385.5 million speakers. The Malayo-Polynesian languages are spoken by the Austronesian peoples outside of Taiwan, in the island nations of Southeas ...
branch of the Austronesian language family. Within Malayo-Polynesian, they are divided into several sub-branches: Chamic (which are represented by Acehnese in which its closest relatives are languages spoken by Ethnic Chams in Cambodia and Vietnam),
Malayic The Malayic languages are a branch of the Malayo-Polynesian subgroup of the Austronesian language family. The most prominent member is Malay, which is the national language of Brunei, Singapore and Malaysia; it further serves as basis for Ind ...
( Malay,
Minangkabau Minangkabau may refer to: * Minangkabau culture, culture of the Minangkabau people * Minangkabau Culture Documentation and Information Center * Minangkabau Express, an airport rail link service serving Minangkabau International Airport (''see belo ...
and other closely related languages), Northwest Sumatra–Barrier Islands (
Batak languages __FORCETOC__ The Batak languages are a subgroup of the Austronesian languages spoken by the Batak people in the Indonesian province of North Sumatra and surrounding areas. Internal classification The Batak languages can be divided into two ...
, Gayo and others), Lampungic (includes Proper Lampung and Komering) and
Bornean Borean (also Boreal or Boralean)http://ehl.santafe.edu/EhlforWeb.pdf is a hypothetical linguistic macrofamily that encompasses almost all language families worldwide except those native to the Americas, Africa, Oceania, and the Andaman Islands. ...
(represented by Rejang in which its closest linguistic relatives are Bukar Sadong and Land Dayak spoken in
West Kalimantan West Kalimantan ( id, Kalimantan Barat) is a province of Indonesia. It is one of five Indonesian provinces comprising Kalimantan, the Indonesian part of the island of Borneo. Its capital city is Pontianak. The province has an area of 147,307&nbs ...
and
Sarawak Sarawak (; ) is a state of Malaysia. The largest among the 13 states, with an area almost equal to that of Peninsular Malaysia, Sarawak is located in northwest Borneo Island, and is bordered by the Malaysian state of Sabah to the northeast, ...
(
Malaysia Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two r ...
)). Northwest Sumatra–Barrier Islands and Lampungic branches are endemic to the island. Like all parts of Indonesia, Indonesian (which was based on Riau Malay) is the official language and the main lingua franca. Although Sumatra has its own local lingua franca, variants of Malay like Medan Malay and Palembang Malay are popular in North and South Sumatra, especially in urban areas. Minangkabau (Padang dialect) is popular in West Sumatra, some parts of North Sumatra, Bengkulu, Jambi and Riau (especially in Pekanbaru and areas bordered with
West Sumatra West Sumatra ( id, Sumatra Barat) is a province of Indonesia. It is located on the west coast of the island of Sumatra and includes the Mentawai Islands off that coast. The province has an area of , with a population of 5,534,472 at the 2020 cen ...
) while Acehnese is also used as an inter-ethnic means of communication in some parts of Aceh province.


Religion

The majority of people in Sumatra are Muslims (87.1%), while 10.7% are Christians, and less than 2% are Buddhists and Hindus.


Administration

Sumatra is one of seven geographical
regions of Indonesia This is a list of some of the regions of Indonesia. Many regions are defined in law or regulations by the central government. At different times of Indonesia's history, the nation has been designated as having regions that do not necessarily corr ...
which includes its adjacent smaller islands. Sumatra was one of the eight original provinces of Indonesia between 1945 and 1948. Including adjacent archipelagoes normally included with Sumatra (such as the Riau Islands, Nias and the Bangka-Belitung group), it now covers ten of Indonesia's 37 provinces, which are set out below with their areas and populations.


Geography

The longest axis of the island runs approximately northwest–southeast, crossing the equator near the centre. At its widest point, the island spans . The interior of the island is dominated by two geographical regions: the
Barisan Mountains The Bukit Barisan or the Barisan Mountains are a mountain range on the western side of Sumatra, Indonesia, covering nearly 1,700 km (1,050 mi) from the north to the south of the island. The Bukit Barisan range consists primarily of volca ...
in the west and swampy plains in the east. Sumatra is the closest Indonesian island to mainland Asia. To the southeast is
Java Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's mos ...
, separated by the Sunda Strait. To the north is the Malay Peninsula (located on the Asian mainland), separated by the
Strait of Malacca The Strait of Malacca is a narrow stretch of water, 500 mi (800 km) long and from 40 to 155 mi (65–250 km) wide, between the Malay Peninsula (Peninsular Malaysia) to the northeast and the Indonesian island of Sumatra to the southwest, connec ...
. To the east is
Borneo Borneo (; id, Kalimantan) is the third-largest island in the world and the largest in Asia. At the geographic centre of Maritime Southeast Asia, in relation to major Indonesian islands, it is located north of Java, west of Sulawesi, and ea ...
, across the
Karimata Strait The Karimata Strait (alternatively, Carimata or Caramata; id, Selat Karimata) is a wide strait that connects the South China Sea to the Java Sea, separating the Indonesian islands of Belitung to the west and Borneo (Kalimantan) to the east. It ...
. West of the island is the
Indian Ocean The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or ~19.8% of the water on Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia to the east. To the south it is bounded by t ...
. The
Great Sumatran fault The Indonesian island of Sumatra is located in a highly seismic area of the world. In addition to the subduction zone off the west coast of the island, Sumatra also has a large strike-slip fault, the Great Sumatran Fault also known as Semangko ...
(a strike-slip fault), and the Sunda megathrust (a subduction zone), run the entire length of the island along its west coast. On 26 December 2004, the western coast and islands of Sumatra, particularly Aceh province, were struck by a
tsunami A tsunami ( ; from ja, 津波, lit=harbour wave, ) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater exp ...
following the Indian Ocean earthquake. This was the longest earthquake recorded, lasting between 500 and 600 seconds. More than 170,000 Indonesians were killed, primarily in Aceh. Other recent earthquakes to strike Sumatra include the 2005 Nias–Simeulue earthquake and the
2010 Mentawai earthquake and tsunami The 2010 Mentawai earthquake occurred with a moment magnitude of 7.8 on 25 October off the western coast of Sumatra at 21:42 local time (14:42 UTC). The earthquake occurred on the same fault that produced the 2004 Indian Ocean earthquake. It w ...
.
Lake Toba Lake Toba ( id, Danau Toba) ( Toba Batak: ᯖᯀᯬ ᯖᯬᯅ; romanized: ''Tao Toba'') is a large natural lake in North Sumatra, Indonesia, occupying the caldera of a supervolcano. The lake is located in the middle of the northern part of the i ...
is the site of a supervolcanic
eruption Several types of volcanic eruptions—during which lava, tephra (ash, lapilli, volcanic bombs and volcanic blocks), and assorted gases are expelled from a volcanic vent or fissure—have been distinguished by volcanologists. These are often ...
that occurred around 74,000 years ago, representing a climate-changing event. The most important rivers in Sumatra belong to the catchment area of the
South China Sea The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phi ...
. Heading north to south, the Rokan, Siak, Kampar, Indragiri,
Batanghari The Batang Hari ( Indonesian: ''Sungai Batanghari'') is the longest river in Jambi province, Sumatra island, Indonesia, about northwest of the capital Jakarta. Hydrology The river originates in the Minangkabau Highlands, home of the Minan ...
flow into the
Malacca Strait The Strait of Malacca is a narrow stretch of water, 500 mi (800 km) long and from 40 to 155 mi (65–250 km) wide, between the Malay Peninsula (Peninsular Malaysia) to the northeast and the Indonesian island of Sumatra to the southwest, connec ...
, while the island's largest river, the Musi, flows into the sea at Bangka Strait in the south. To the east, big rivers carry silt from the mountains, forming the vast lowland interspersed by swamps. Even if mostly unsuitable for farming, the area is currently of great economic importance for Indonesia. It produces oil from both above and below the soil – palm oil and
petroleum Petroleum, also known as crude oil, or simply oil, is a naturally occurring yellowish-black liquid mixture of mainly hydrocarbons, and is found in geological formations. The name ''petroleum'' covers both naturally occurring unprocessed crud ...
. Sumatra is the largest producer of Indonesian coffee. Small-holders grow Arabica coffee ('' Coffea arabica'') in the highlands, while Robusta (''
Coffea canephora ''Coffea canephora'' ( syn. ''Coffea robusta'', commonly known as ''robusta coffee'') is a species of coffee that has its origins in central and western sub-Saharan Africa. It is a species of flowering plant in the family Rubiaceae. Though wid ...
'') is found in the lowlands. Arabica coffee from the regions of Gayo, Lintong and Sidikilang is typically processed using the Giling Basah (wet hulling) technique, which gives it a heavy body and low acidity. Sumatra is a highly seismic island, huge earthquakes have been recorded throughout history, in 1797 an 8.9 earthquake shook Western Sumatra, in 1833 a 9.2 earthquake shook Bengkulu and Western Sumatra both events caused large tsunamis. They are very common throughout the coastal area of the west and center of the island, tsunamis are common due to the high seismicity in the area.


Largest cities

By population, Medan is the largest city in Sumatra.Biro Pusat Statistik, Jakarta. Medan is also the most visited and developed city in Sumatra.


Flora and fauna

Sumatra supports a wide range of vegetation types that are home to a rich variety of species, including 17 endemic genera of plants. Unique species include the Sumatran pine which dominates the Sumatran tropical pine forests of the higher mountainsides in the north of the island and rainforest plants such as ''
Rafflesia arnoldii ''Rafflesia arnoldii'', the corpse flower or giant padma, is a species of flowering plant in the parasitic genus ''Rafflesia''. It is noted for producing the largest individual flower on Earth. It has a strong and unpleasant odor of decaying ...
'' (the world's largest individual flower), and the
titan arum Titan most often refers to: * Titan (moon), the largest moon of Saturn * Titans, a race of deities in Greek mythology Titan or Titans may also refer to: Arts and entertainment Fictional entities Fictional locations * Titan in fiction, fictio ...
(the world's largest unbranched
inflorescence An inflorescence is a group or cluster of flowers arranged on a Plant stem, stem that is composed of a main branch or a complicated arrangement of branches. Morphology (biology), Morphologically, it is the modified part of the shoot of sperma ...
). The island is home to 201 mammal species and 580 bird species. There are nine endemic mammal species on mainland Sumatra and 14 more endemic to the nearby
Mentawai Islands Mentawai may refer to: * Mentawai Islands * Mentawai Strait * Mentawai people * Mentawai language The Mentawai language is an Austronesian language, spoken by the Mentawai people of the Mentawai Islands, West Sumatra, Indonesia. Dialects Ac ...
. There are about 300 freshwater fish species in Sumatra. There are 93 amphibian species in Sumatra, 21 of which are endemic to Sumatra. The Sumatran tiger,
Sumatran rhinoceros The Sumatran rhinoceros (''Dicerorhinus sumatrensis''), also known as the Sumatran rhino, hairy rhinoceros or Asian two-horned rhinoceros, is a rare member of the family Rhinocerotidae and one of five extant species of rhinoceros. It is the o ...
,
Sumatran elephant The Sumatran elephant (''Elephas maximus sumatranus'') is one of four recognized subspecies of the Asian elephant, and native to the Indonesian island of Sumatra. In 2011, IUCN upgraded the conservation status of the Sumatran elephant from endang ...
, Sumatran ground cuckoo, Sumatran orangutan and
Tapanuli orangutan The Tapanuli orangutan (''Pongo tapanuliensis'') is a species of orangutan restricted to South Tapanuli in the island of Sumatra in Indonesia. It is one of three known species of orangutan, alongside the Sumatran orangutan (''P. abelii''), fou ...
are all critically endangered, indicating the highest level of threat to their survival. In October 2008, the Indonesian government announced a plan to protect Sumatra's remaining forests. The island includes more than 10 national parks, including three which are listed as the
Tropical Rainforest Heritage of Sumatra The Tropical Rainforest Heritage of Sumatra site was inscribed as a UNESCO World Heritage site in 2004. It comprises three Indonesian national parks on the island of Sumatra: Gunung Leuser National Park, Kerinci Seblat National Park and the Buki ...
World Heritage Site A World Heritage Site is a landmark or area with legal protection by an international convention administered by the United Nations Educational, Scientific and Cultural Organization (UNESCO). World Heritage Sites are designated by UNESCO for h ...
Gunung Leuser National Park,
Kerinci Seblat National Park Kerinci Seblat National Park is the largest national park on the island of Sumatra, Indonesia. It has a total area of 13,791 km2, and spans four provinces: West Sumatra, Jambi, Bengkulu, and South Sumatra. Geography It is located between 1 ...
and Bukit Barisan Selatan National Park. The Berbak National Park is one of three national parks in Indonesia listed as a
wetland A wetland is a distinct ecosystem that is flooded or saturated by water, either permanently (for years or decades) or seasonally (for weeks or months). Flooding results in oxygen-free (anoxic) processes prevailing, especially in the soils. The p ...
of international importance under the
Ramsar Convention The Ramsar Convention on Wetlands of International Importance Especially as Waterfowl Habitat is an international treaty for the conservation and sustainable use of Ramsar site, Ramsar sites (wetlands). It is also known as the Convention on W ...
.


Rail transport

Several unconnected railway networks built during Netherlands East Indies exist in Sumatra, such as the ones connecting Banda Aceh-
Lhokseumawe Lhokseumawe ( id, Kota Lhokseumawe; ace, Lhôk Seumaw‘è, Jawi: ), is the second largest city in Aceh province, Indonesia. The city covers an area of 181.06 square kilometres, and had a population of 171,163 at the 2010 censusBiro Pusat Stati ...
- Besitang-
Medan Medan (; English: ) is the capital and largest city of the Indonesian province of North Sumatra, as well as a regional hub and financial centre of Sumatra. According to the National Development Planning Agency, Medan is one of the four mai ...
-Tebingtinggi-
Pematang Siantar Pematangsiantar (sometimes written as Pematang Siantar, acronym PS or ''P. Siantar'', colloquially just Siantar), is an independent city in North Sumatra, Indonesia, surrounded by, but not part of, the Simalungun Regency, making Pematangsiantar a ...
-Rantau Prapat in Northern Sumatra (the Banda Aceh-Besitang section was closed in 1971, but is currently being rebuilt).
Padang Padang () is the capital and largest city of the Indonesian province of West Sumatra. With a Census population of 1,015,000 as of 2022, it is the 16th most populous city in Indonesia and the most populous city on the west coast of Sumatra. Th ...
-
Solok (BERAS)(Clean, Elegant, Neat, Safe and Prosperous) , image_shield = Logo Kota Solok.png , image_map = Lokasi Sumatra Barat Kota Solok.svg , map_caption = Location within West Sumatra , pushpin_map =Indon ...
-
Bukittinggi Bukittinggi ( min, Bukiktinggi, Jawi: , formerly nl, Fort de Kock) is the third largest city in West Sumatra, Indonesia, with a population of 111,312 in 2010 and 121,028 in 2020, and an area of 25.24 km2. It is in the Minangkabau Highla ...
in
West Sumatra West Sumatra ( id, Sumatra Barat) is a province of Indonesia. It is located on the west coast of the island of Sumatra and includes the Mentawai Islands off that coast. The province has an area of , with a population of 5,534,472 at the 2020 cen ...
, and
Bandar Lampung Bandar Lampung (Lampung language, Lampung: , ''Kutak Bandarlampung'', formerly Dutch language, Dutch: ''Oosthaven'', lit. "Eastern Harbor") is the capital city, capital and largest city of the Indonesian Provinces of Indonesia, province of Lampun ...
- Palembang-Lahat-Lubuk Linggau in Southern Sumatra.


See also

*
Architecture of Sumatra The Indonesian island of Sumatra is the sixth largest island in the world. The rich ethnic diversity and historical heritage in Sumatra is reflected in the range of architectural styles in the island. The vernacular style is the native Sumatran ...
*
Bukit Seguntang ''Bukit Seguntang'' or ''Bukit Siguntang'' (English: Seguntang Hill or Siguntang Hill) is a 29–30 metres high small hill located at the northern bank of Musi River and within the vicinity of Palembang, capital city of South Sumatra, Indonesi ...
* Communism in Sumatra * Music of Sumatra


References


Further reading

* * William Marsden
''The History of Sumatra''
(1783); 3rd ed. (1811) freely available online.


External links

* {{Authority control Greater Sunda Islands Maritime Southeast Asia