Mashu volcan

caldeira 855 m / 2,805 ft
Hokkaido, Japon, 43.51°N / 144.57°E
Condition actuelle: normal / en sommeil (1 sur 5)

Mashu volcano is a 7 km wide caldera in NE Hokkaido, Japan.
The caldera formed ca. 7000 years ago and truncates a stratovolcano which formed the ESE rim of the large Kutcharo caldera to the west. The steep-walled Mashu caldera contains Lake Mashu (摩周湖 Mashū-ko), known for its very clear water, and is one of the scenic highlights of Hokkaido.

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Style éruptif tipique: explosive
Eruptions du volcan Mashu: 1080 ± 100 years, 350 AD ± 100 years, 150 AD ± 100 years, 2050 BC ± 40 years, 2800 BC ± 1000 years, 3550 BC ± 40 years, 5550 BC ± 100 years (Plinian eruption, caldera formation) (radiocarbon dated)

Latest nearby earthquakes

HeureMag. / ProfondeurDistanceLieu
Wed, 12 May 2021 (GMT) (1 séisme)
May 12, 2021 09:12:44.16 (12 May 2021 00:12:44 GMT)
2.9

96 km - Plus
kmNotsuke-gun, 26 km au sud de Shibetsu, Hokkaido, Japon
Tue, 11 May 2021 (GMT) (1 séisme)
May 11, 2021 21:53:04.64 (11 May 2021 12:53:04 GMT)
2.6

105 km - Plus
kmNotsuke-gun, 21 km au sud de Shibetsu, Hokkaido, Japon
Wed, 5 May 2021 (GMT) (1 séisme)
May 05, 2021 19:18:56.66 (5 May 2021 10:18:56 GMT)
3.2

138 km - Plus
kmKawakami-gun, 55 km au nord de Kushiro, Hokkaido, Japon
Sat, 1 May 2021 (GMT) (1 séisme)
May 01, 2021 13:33:57.72 (1 May 2021 04:33:57 GMT)
3.4

2.1 km - Plus
kmDistrict d'Abashiri, 33 km au sud-est de Kitami, Ktiami Shi, Hokkaido, Japon

Introduction

A small andesitic stratovolcano, Kamuinupuri, was constructed beginning about 4000 years ago in the SE part of of the deep caldera lake. The latest dated eruption of the volcano was a large explosive eruption about 1000 years ago, which created a 1.2 x 1.5 km crater at the summit of Kamuinupuri.
Kamuishu is a small island in the center of Lake Mashu. It is the tip of a mostly submerged dacitic lava dome.


See also: Sentinel hub | Landsat 8
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