Akan Volcano
Hokkaido (Japon), 43.38°N / 144.01°E
Condition actuelle: normal / en sommeil (1 sur 5)
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.
Eruptions du volcan Akan: 2008, 2006, 1988, 1966, 1965, 1964, 1962, 1960, 1959, 1958, 1957, 1956, 1955, 1954, 1951(?)-52, 1927 (?), 1808 (?), 1800
Derniers séismes proches
| Heure | Mag. / Profondeur | Distance / Lieu | |||
Introduction
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.
Akan Volcano Photos
Eruptions du volcan Akan
Tremblement a été enregistré le 17 Novembre 2008. Une petite éruption de cendres a eu lieu le 18 Novembre, et a ensuite été détecté par un nouveau dépôt de cendres sur la neige en allant jusqu'à 400 m de distance du cratère Ponmachineshiri. Une autre éruption de cendres s'est produite le 28 Novembre, produisant un panache de cendres atteignant 2 petits km d'altitude.
(Source: Smithsonian / GVP rapports mensuels)
Une petite éruption s'est produite à partir d'un évent sur le flanc NE de Meakan le 21 Mars 2006. Ashfall a été observé 10 km au SE du volcan.
Une éruption de cendres du volcan s'est produite petite Meakan le 9 Novembre 1998.
Une petite éruption phréatique s'est produite le 21 Novembre 1996.
Latest satellite images
