Onekotan
Encyclopedia
Onekotan Island is an uninhabited volcanic island located near the northern end of the Kuril Islands
Kuril Islands
The Kuril Islands , in Russia's Sakhalin Oblast region, form a volcanic archipelago that stretches approximately northeast from Hokkaidō, Japan, to Kamchatka, Russia, separating the Sea of Okhotsk from the North Pacific Ocean. There are 56 islands and many more minor rocks. It consists of Greater...

 chain in the Sea of Okhotsk
Sea of Okhotsk
The Sea of Okhotsk is a marginal sea of the western Pacific Ocean, lying between the Kamchatka Peninsula on the east, the Kuril Islands on the southeast, the island of Hokkaidō to the far south, the island of Sakhalin along the west, and a long stretch of eastern Siberian coast along the west and...

 in the northwest Pacific Ocean
Pacific Ocean
The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...

. Its name is derived from the Ainu language
Ainu language
Ainu is one of the Ainu languages, spoken by members of the Ainu ethnic group on the northern Japanese island of Hokkaidō....

 for "large village".

Geology

Onekotan is roughly rectangular, with a length of 42.5 kilometers, and a width ranging from 11 kilometers to 17 kilometers. It has an area of 425 km²

The island consists of two stratovolcano
Stratovolcano
A stratovolcano, also known as a composite volcano, is a tall, conical volcano built up by many layers of hardened lava, tephra, pumice, and volcanic ash. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile and periodic, explosive eruptions...

s connected by a relatively flat isthmus.
  • Krenitsyn
    Krenitsyn
    Krenitsyn, spelt Krenitzin in the United States, may refer to any of the following:*Pyotr Krenitsyn, a Russian explorer and Captain/Lieutenant of the Imperial Russian Navy....

    -' onMouseout='HidePop("82614")' href="/topics/Japanese_language">Japanese
    Japanese language
    is a language spoken by over 130 million people in Japan and in Japanese emigrant communities. It is a member of the Japonic language family, which has a number of proposed relationships with other languages, none of which has gained wide acceptance among historical linguists .Japanese is an...

     黒石山; Kuroishiyama) with a height of 1,325 meters is the prominent caldera at the southern end of the island. This volcano was named after Captain Pyotr Krenitsyn
    Pyotr Krenitsyn
    Pyotr Kuzmich Krenitsyn , spelt "Krenitzin" in the United States, was a Russian explorer and Captain/Lieutenant of the Imperial Russian Navy. Following Vitus Bering's 1741 tragic venture he was the first to conduct an expedition to Alaska and the Aleutians...

     of the Imperial Russian Navy
    Imperial Russian Navy
    The Imperial Russian Navy refers to the Tsarist fleets prior to the February Revolution.-First Romanovs:Under Tsar Mikhail Feodorovich, construction of the first three-masted ship, actually built within Russia, was completed in 1636. It was built in Balakhna by Danish shipbuilders from Holstein...

    . The mountain rises from a depth of from 600 to 900 meters, and contains a deep central caldera lake, called Tao-Rusyr Caldera
    Tao-Rusyr Caldera
    Tao-Rusyr Caldera is a stratovolcano located at the southern end of Onekotan Island, Kuril Islands, Russia. It has 7.5 km wide caldera formed during a catastrophic eruption less than 10,000 years ago...

    . The central peak of this " island within the island" is actually the highest point on Onekotan Island
  • Nemo -' onMouseout='HidePop("53530")' href="/topics/Japanese_language">Japanese
    Japanese language
    is a language spoken by over 130 million people in Japan and in Japanese emigrant communities. It is a member of the Japonic language family, which has a number of proposed relationships with other languages, none of which has gained wide acceptance among historical linguists .Japanese is an...

     根茂山; Nemoyama) with a height of 1,019 meters is the peak to the north. It has two nested subsidiary caldera
    Caldera
    A caldera is a cauldron-like volcanic feature usually formed by the collapse of land following a volcanic eruption, such as the one at Yellowstone National Park in the US. They are sometimes confused with volcanic craters...

    s, with the cone of Nemo Peak
    Nemo Peak
    Nemo Peak is a stratovolcano located at the northern end of Onekotan Island, Kuril Islands, Russia. It is truncated by two nested calderas, with the cone of Nemo Peak itself rising in the southwest end of the youngest caldera and a crescent-shaped crater lake partially filling the northeast part....

     rising in the southwest end of the youngest caldera and a crescent-shaped crater lake
    Crater lake
    A crater lake is a lake that forms in a volcanic crater or caldera, such as a maar; less commonly and with lower association to the term a lake may form in an impact crater caused by a meteorite. Sometimes lakes which form inside calderas are called caldera lakes, but often this distinction is not...

     partially filling the northeast part.

Onekotan Island is separated from the neighboring islands by the Fourth Kuril Strait
Fourth Kuril Strait
Fourth Kuril Strait is a strait, located at , separating islands of Onekotan and Paramushir in the Kuril Islands, Russia....

, Yevreinov Strait, and Krenitsyn Strait. The neighboring islands are Makanrushi Island, with a 1170 meters volcanic peak, to the northwest of Onekotan Island; and Kharimkotan Island, with a 1210 meter high volcano, to the south.

Onekotan still has an active volcano with the most recent eruption, in 1952, forming a small lava dome
Lava dome
|250px|thumb|right|Image of the [[rhyolitic]] lava dome of [[Chaitén Volcano]] during its 2008–2009 eruption.In volcanology, a lava dome is a roughly circular mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano...

 on the island's coast.

There are char
Salvelinus
Salvelinus is a genus of salmonid fish often called char or charr; some species are called "trout". Salvelinus is a member of the Salmoninae subfamily of the Salmonidae family. Charr may be identified by light cream pink or red spots over a darker body. Scales tend to be small, with 115-200 along...

s in Lake Chyornoye, one of the two lakes on Onekotan, located at the northern end of the island.

History

Onekotan, with a number of shallow bays and sandy beaching providing landing points, was inhabitated by the Ainu
Ainu people
The , also called Aynu, Aino , and in historical texts Ezo , are indigenous people or groups in Japan and Russia. Historically they spoke the Ainu language and related varieties and lived in Hokkaidō, the Kuril Islands, and much of Sakhalin...

 prior to European contact. It appears on an official map showing the territories of Matsumae Domain
Matsumae clan
The was a Japanese clan which was granted the area around Matsumae, Hokkaidō as a march fief in 1590 by Toyotomi Hideyoshi, and charged with defending it, and by extension all of Japan, from the Ainu 'barbarians' to the north. The clan was originally known as the Kakizaki clan who settled...

, a feudal domain of Edo period
Edo period
The , or , is a division of Japanese history which was ruled by the shoguns of the Tokugawa family, running from 1603 to 1868. The political entity of this period was the Tokugawa shogunate....

 Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

 dated 1644, and these holdings were officially confirmed by the Tokugawa shogunate
Tokugawa shogunate
The Tokugawa shogunate, also known as the and the , was a feudal regime of Japan established by Tokugawa Ieyasu and ruled by the shoguns of the Tokugawa family. This period is known as the Edo period and gets its name from the capital city, Edo, which is now called Tokyo, after the name was...

 in 1715. Subsequently claimed by the Empire of Russia, sovereignty
Sovereignty
Sovereignty is the quality of having supreme, independent authority over a geographic area, such as a territory. It can be found in a power to rule and make law that rests on a political fact for which no purely legal explanation can be provided...

 initially passed to Russia under the terms of the Treaty of Shimoda
Treaty of Shimoda
The Treaty of Shimoda of 1855, formally Treaty of Commerce and Navigation between Japan and Russia , was signed between the Russian Vice-Admiral Euphimy Vasil'evich Putiatin and Toshiakira Kawaji of Japan in the city of Shimoda, Izu Province, Japan, on February 7, 1855...

, but was returned to the Empire of Japan
Empire of Japan
The Empire of Japan is the name of the state of Japan that existed from the Meiji Restoration on 3 January 1868 to the enactment of the post-World War II Constitution of...

 per the Treaty of Saint Petersburg (1875) along with the rest of the Kurile islands. The island was formerly administered as part of Shimushu District of Nemuro Subprefecture
Nemuro Subprefecture
is a subprefecture of Hokkaidō, Japan. The Japanese claim the disputed Southern Kurile Islands as part of this subprefecture....

 of Hokkaidō
Hokkaido
, formerly known as Ezo, Yezo, Yeso, or Yesso, is Japan's second largest island; it is also the largest and northernmost of Japan's 47 prefectural-level subdivisions. The Tsugaru Strait separates Hokkaido from Honshu, although the two islands are connected by the underwater railway Seikan Tunnel...

. After World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

, the island came under the control of the Soviet Union
Soviet Union
The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

, and is now administered as part of the Sakhalin Oblast
Sakhalin Oblast
Sakhalin Oblast is a federal subject of Russia comprising the island of Sakhalin and the Kuril Islands.The oblast has an area of 87,100 km² and a population of 546,695...

 of the Russian Federation.

Further reading

  • Gorshkov, G. S. Volcanism and the Upper Mantle Investigations in the Kurile Island Arc. Monographs in geoscience. New York: Plenum Press, 1970. ISBN 0-306-30407-4
  • Krasheninnikov, Stepan Petrovich, and James Greive. The History of Kamtschatka and the Kurilski Islands, with the Countries Adjacent. Chicago: Quadrangle Books, 1963.
  • Rees, David. The Soviet Seizure of the Kuriles. New York: Praeger, 1985. ISBN 0-03-002552-4
  • Takahashi, Hideki, and Masahiro Ōhara. Biodiversity and Biogeography of the Kuril Islands and Sakhalin. Bulletin of the Hokkaido University Museum, no. 2-. Sapporo, Japan: Hokkaido University Museum, 2004.


External links

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