Akan vulcano

Caldera 1499 m / 4,918 ft
Hokkaido, Giappone, 43.38°N / 144.01°E
Stato attuale: normal or dormant (1 di 5)
Last update: 23 Nov 2018 (Alert level raised)

Akan volcano (阿寒岳, Akan-dake) is one of Hokkaido's most active volcanoes. Akan consists of a large 24 x 13 km diameter caldera and a group of younger partly Holocene andesite cones. The highest point of the complex is the Mount Meakan (1499 m) stratovolcano.
The frequent historic eruptions occurred all from the Me-Akan group, east of Lake Akan. Me-Akan volcano (雌阿寒岳 Meakan-dake) consists of 9 overlapping cones. Its summit has 3 craters.
Me-Akan has had at least 17 small phreatic eruptions since the beginning of the 19th century and from geologic studies it is known that there were at least 4 major magmatic eruptions with pyroclastic flows have occurred in prehistoric time during the past 10,000 years.

Lake Akan is part of the Akan National Park. It is known for a rare green algae (marimo) which can grow to about the size of a soccer ball. The only town around the lake is the resort of Akankohan known for its hot springs and the "bokke", bubbling mud pools found at the lakeshore.

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Stile eruttivo tipico: explosive
Eruzioni del vulcano Akan: 2008, 2006, 1988, 1966, 1965, 1964, 1962, 1960, 1959, 1958, 1957, 1956, 1955, 1954, 1951(?)-52, 1927 (?), 1808 (?), 1800

Latest nearby earthquakes

Data / oraMag. / ProfonditàDistanzaUbicazione
Tue, 18 May 2021 (GMT) (1 terremoto)
May 18, 2021 19:47:49.26 (18 May 2021 10:47:49 GMT)
2.9

127 km - Di più
kmAshoro-gun, 52 km a sud da Kitami, Ktiami Shi, Hokkaido, Giappone
Mon, 10 May 2021 (GMT) (1 terremoto)
May 11, 2021 01:31:22.22 (10 May 2021 16:31:22 GMT)
2.6

138 km - Di più
kmShiranuka-gun, 50 km a ovest da Kushiro, Hokkaido, Giappone
Sat, 8 May 2021 (GMT) (1 terremoto)
May 08, 2021 10:32:11.78 (8 May 2021 01:32:11 GMT)
2.5

118 km - Di più
km7.3 km a nord ovest da Kushiro, Hokkaido, Giappone
Wed, 5 May 2021 (GMT) (1 terremoto)
May 05, 2021 19:18:56.66 (5 May 2021 10:18:56 GMT)
3.2

138 km - Di più
kmKawakami-gun, 55 km a nord da Kushiro, Hokkaido, Giappone

Sfondo

The Akan caldera is located immediately SW of Kutcharo caldera and has an elonogated, irregular shape due to several caldera-forming explosive eruptions between the early and mid Pleistocene.
Growth of 3 post-caldera stratovolcanoes, 3 at the SW end of the caldera and the other at the NE side, has reduced the size of the caldera lake. The conical O-Akan volcano was frequently active during the Holocene. The 1-km-wide Nakamachineshiri crater of Me-Akan volcano was formed during a major pumice-and-scoria eruption about 13,500 years ago.

2008 eruption
Tremor was recorded on 17 November 2008. A small ash eruption occurred on 18 November, and was later detected by a fresh deposit of ash on snow in up to 400 m distance from the Ponmachineshiri crater. Another ash eruption occurred on 28 November, producing a small ash plume reaching 2 km altitude.
(Source: Smithsonian / GVP monthly reports)

2006 eruption
A small eruption occurred from a vent on the NE flank of Meakan on 21 March 2006. Ashfall was observed 10 km SE of the volcano.

1998 eruption
A small ash eruption occurred from Meakan volcano on 9 November 1998.

1996 eruption
A small phreatic eruption occurred on 21 November 1996.

See also: Sentinel hub | Landsat 8
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