Suwanose-jima volcan

stratovolcan 799 m/ 2,621 ft
Îles Ryūkyū, Japon, 29.64°N / 129.72°E
Condition actuelle: Activité petite ou avertissement éruption imminente (3 sur 5)
Last update: 3 août 2021 (Volcanic Ash Advisory)

Suwanose-jima (諏訪之瀬島) volcano is Japan's and one of the world's most active volcanoes. It has been in a state of near-continuous strombolian-type eruption since 1949.
The volcano forms the 8 km long spindle-shaped island of the same name in northern Ryuku Islands, Japan. The remote island is home to about 50 residents only.
Suwanose-jima consists of an andesitic stratovolcano with 2 historically active summit craters. Intermittent to continuous strombolian activity began from On-take (Otake), the NE summit crater, in 1949 and has been going on since. After 1996, occasional periods of inactivity have become more frequent.

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Style éruptif tipique: explosive, strombolian
Eruptions du volcan Suwanose-jima: 2004 (Oct) - 2011 (ongoing) strombolian-type activity
Since 1949: essentially continuous activity
1999 (Jan-Feb, June), 2000 (Dec) - Jul 2004 (Jul): strombolian activity
1996 (Dec) - 1997 (Apr), 1949-96, 1940, 1938, 1934 (?), 1925, 1921-22, 1915 (?), 1914 (?), 1889, 1885, 1884, 1877, 1813, around 1600 AD (large explosive eruption)

Latest nearby earthquakes

HeureMag. / ProfondeurDistance/Lieu
Sun, 1 Aug 2021 (GMT) (1 séisme)
Aug 01, 2021 13:01:18.19 (1 Aug 2021 04:01:18 GMT)
2.7

110 km
6 km (3.7 mi)
East China Sea, 140 km au nord de Naze, Amami Shi, Kagoshima, Japon

Introduction

The summit of Suwanose-jima volcano is truncated by a large breached crater extending to the sea on the east flank that was formed by edifice collapse.

The largest historical eruption took place in 1813-14, when thick scoria deposits blanketed residential areas, and the SW crater produced 2 lava flows that reached the western coast. At the end of the eruption the summit of On-take collapsed forming a large debris avalanche and creating the horseshoe-shaped Sakuchi caldera, which extends to the eastern coast. The island remained uninhabited for about 70 years after the 1813-1814 eruption. Lava flows reached the eastern coast of the island in 1884.
(Source: Smithsonian / GVP information)

1979-80 activity
A typical 2 year log of activity from Smithsonian's Monthy reports is presented here, illustrating the pulsating, but essentially persistant strombolian activity observed at Suwanose-jima volcano ...plus

See also: Sentinel hub | Landsat 8
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