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Saturday, Feb 23, 2013
A swarm of earthquakes occurred over the the past days in an area a few km south of the island at about 10 km depth.
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Saturday, Dec 22, 2012
Although no explosive eruptions occurred at Otake crater in November, very small eruptions occurred there intermittently. The maximum plume height was 500 m above the crater rim during this period (max. 700 m in October). Weak volcanic glows in the crater were sometimes recorded at night with high-sensitivity cameras. ...
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Suwanose-jima volcanostratovolcano 799 m/ 2,621 ft
Ryukyu Islands, Japan, 29.64°N / 129.72°E Current status: minor activity or eruption warning (3 out of 5) Suwanose-jima webcams / live data [hide map] [enlarge map]
Last update: 23 Feb 2013
Typical eruption style: explosive, strombolian Suwanose-jima volcano eruptions: 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) Last earthquakes nearby:
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. Background: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 ...more |
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