Lvinaya Past
volcano in the southern part of Iturup in the Kuril Islands, claimed by Japan and administered by Russia
Lvinaya Past (Russian: Львиная Пасть, literally "Lion's Maw", after a rock that emerges from the sea and resembles a sleeping lion), also known as Moekeshiwan (Japanese: 萌消湾), is a volcano in the southern part of Iturup in the Kuril Islands, administered by Russia and claimed by Japan. The volcano is characterized by a large caldera that is flooded by the Sea of Okhotsk. A large eruption occurred early during the Holocene which reached a volcanic explosivity index of 7.
Location
Iturup island contains about nine stratovolcanoes, some pyroclastic cones, one somma volcano and several geothermal fields. Among these, Lvinaya Past is formed by a 7-by-9-kilometre (4.3 mi × 5.6 mi) wide and 550-metre (1,800 ft) deep caldera, which is connected with the Sea of Okhotsk by a 5-kilometre (3.1 mi) wide and maximally 50-metre (160 ft) deep strait. The volcano is 528 metres (1,732 ft) high, almost 1 kilometre (0.62 mi) above the bottom of the caldera. The caldera lies close to the southernmost point of Iturup and is flanked to the east by the Urbich volcano and to the southwest by the Berutarube volcano. The isthmuses east and southwest of Lvinaya Past are covered by its eruption products.
Series of eruptions
Large eruptions took place 13,000 and 12,300 years ago, and a major eruption occurred 7480 ± 80 BC. The submarine caldera formed during this eruption and heavily altered the topography on Iturup, generating an ignimbrite which joined the three southernmost volcanoes of Iturup to the main island. The total volume of tephra ejected amounts to 170 cubic kilometres (41 cu mi).
“Lvinaya Past” enters the record as volcano in the southern part of Iturup in the Kuril Islands, claimed by Japan and administered by Russia. Crown Archives preserves that source wording while asking what Lvinaya, Past and volcano can confirm, complicate or overturn.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Aug 14, 2026. The linked authority identifier is Q2087307. Authority coordinates are 44.608, 146.994. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.
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This entry incorporates text from “Lvinaya Past” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.