also Mount Iwo is an active
andesitic
Andesite () is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predomina ...
stratovolcano
A stratovolcano, also known as a composite volcano, is a typically conical volcano built up by many alternating layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with ...
on the
Shiretoko Peninsula
The is located on the easternmost portion of the Japanese island of Hokkaido, protruding into the Sea of Okhotsk. It is separated from the Russian Kunashir Island by the Nemuro Strait. The name Shiretoko is derived from the Ainu language, Ainu wo ...
of
Hokkaidō
is the second-largest island of Japan and comprises the largest and northernmost prefecture, making up its own region. The Tsugaru Strait separates Hokkaidō from Honshu; the two islands are connected by railway via the Seikan Tunnel.
The ...
,
Japan
Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
. It sits within the borders of the town of
Shari. Mount Iō is known for erupting liquid sulphur in the eruptions of 1889 and 1936.
Mount Iō literally means, ''sulphur mountain''. There are two explosion craters and a
lava dome
In volcanology, a lava dome is a circular, mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano. Dome-building eruptions are common, particularly in convergent plate boundary settings. Around 6% of eruptions ...
at the summit of the volcano.
[神沼克伊,小山悦郎 ''日本の火山を科学する 日本列島津々浦々、あなたの身近にある108の活火山とは？'' ソフトバンククリエイティブ 2011. .]
History of eruptions
Volcanic activity started at least 240,000 years ago.
Mount Iō has erupted at the following times:
#850 AD ± 500 years
#1857–1858
#23–26 September 1876
#24–26 November 1880
#9–26 August 1889
#15 June 1890–unknown
#December 1935–October 1936
See also
*
Shiretoko National Park
covers most of the Shiretoko Peninsula at the northeastern tip of the island of Hokkaidō, Japan. The word "Shiretoko" is derived from an Ainu word "sir etok", meaning "the place where the earth protrudes".
One of the most remote regions in ...
*
List of mountains in Japan
A list is a set of discrete items of information collected and set forth in some format for utility, entertainment, or other purposes. A list may be memorialized in any number of ways, including existing only in the mind of the list-maker, but ...
*
List of volcanoes in Japan
This is a list of active and extinct volcanoes in Japan. An Orange background indicates a volcano considered active by the Japan Meteorological Agency.
Hokkaido
Honshū
Izu Islands
Ogasawara Archipelago
The Ogasawara Archipelago ...
References
External links
*
Shiretoko-Iozan- Japan Meteorological Agency
* - Japan Meteorological Agency
Io
Io
Io
Holocene stratovolcanoes
{{Hokkaido-geo-stub