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Kikai volcano (Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 25 April-1 May 2018 (Continuing Activity)

Mi, 25. Apr 2018, 06:00
06:00 AM | VON: VN
JMA reported that the number of volcanic earthquakes at Satsuma Iwo-jima, a subaerial part of Kikai's NW caldera rim, was low during 20-26 April. White plumes rose as high as 700 m above the Iwo-dake lava dome; incandescence from the crater had not been visible since 12 April. During field surveys on 25 and 26 April observers noted a slight expansion of a thermally anomalous area compared to 24-25 March observations, and a decrease in sulfur dioxide flux from 600 tons/day on 24 March to 300 tons/day.
The Alert Level was reduced to 1 (on a 5-level scale) on 27 April.

Source: Japan Meteorological Agency (JMA)
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From: Global Volcanism Program, 2018. Report on Kikai. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 25 April-1 May 2018. Smithsonian Institution and US Geological Survey.

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Mi, 28. Mär 2018, 06:00

Kikai volcano (Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 28 March-3 April 2018 (New Activity / Unrest)

JMA reported that the number of volcanic earthquakes at Satsuma Iwo-jima, a subaerial part of Kikai's NW caldera rim, was low during 27 March-2 April after an increase recorded during 22-23 March. White plumes rose as high as 1.8 km above the Iwo-dake lava dome. Incandescence from the crater was visible at night during 27-28 March. ... Read all
Mi, 14. Mär 2018, 06:00

Kikai volcano (Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 14 March-20 March 2018 (New Activity / Unrest)

JMA reported that one small-amplitude, short-duration volcanic tremor was detected on 16 March at Satsuma Iwo-jima, a subaerial part of Kikai's NW caldera rim. The number of volcanic earthquakes increased on 19 March, prompting JMA to raise the Alert Level to 2 (on a 5-level scale), and then decreased the next day. The report noted increased thermal activity since February, with occasional visual observations of incandescence. ... Read all
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Kikai Vulkan
caldera 704 m / 2,310 ft
Ryukyu-Inseln (Japan), 30.79°N / 130.31°E
Aktueller Status: unruhig (2 von 5) Ausbrüche des Kikai:
2020, 2019, 2013, 2004, 2003, 2002, 2000-01, 2000, 1998-99, 1997, 1988, 1934-35, 1914 (?)
radiocarbon / tephrochronology dated: 1430 ± 75 years, 1340 ± 30, 1030 ± 40, 1010 ± 40, 750 AD (?), 390 AD ± 100, 280 BC ± 75, 1090 BC ± 100, 1830 BC ± 75, 2450 BC ± 1000, 3250 BC ± 75, 3250 BC ± 75
around 4350 BC: VEI 7 caldera-forming eruption, one of the largest on earth in 10,000 years, producing the Akahoya tephra
Typische Aktivität
explosive
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