Tyatya (, also spelled Tiatia and known as Chachadake (爺爺岳) in

Japanese Japanese may refer to: * Something from or related to Japan, an island country in East Asia * Japanese language, spoken mainly in Japan * Japanese people, the ethnic group that identifies with Japan through ancestry or culture ** Japanese diaspor ...

) is a

volcano A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most oft ...

located in the northeastern part of

Kunashir Island Kunashir Island (; ; ), possibly meaning ''Black Island'' or ''Grass Island'' in Ainu, is the southernmost island of the Kuril Islands. The island has been under Russian administration since the end of World War II, when Soviet forces took po ...

Kuril Islands The Kuril Islands or Kurile Islands are a volcanic archipelago administered as part of Sakhalin Oblast in the Russian Far East. The islands stretch approximately northeast from Hokkaido in Japan to Kamchatka Peninsula in Russia, separating the ...

Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...

. It is the highest peak on the island with an elevation of . Tyatya is one of the finest examples anywhere in the world of a

somma volcano A somma volcano, also known as a sommian, is a volcanic caldera that has been partially filled by a new central cone. The type is named after Mount Somma ("Summit"), a stratovolcano in southern Italy with a summit caldera in which the upper co ...

, a

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 ...

whose summit has collapsed to form a

caldera A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic eruption. An eruption that ejects large volumes of magma over a short period of time can cause significant detriment to the str ...

which has then been mostly refilled by a new, younger volcanic cone which rises above the caldera rim.

References

External links

Chachadake (Tiatia): Global Volcanism Program
- Smithsonian Institution

- Japan Meteorological Agency * - Japan Meteorological Agency

- Geological Survey of Japan Kunashir Island Stratovolcanoes of Russia Active volcanoes {{SakhalinOblast-geo-stub

See also

References

External links