Aoga-shima volcano eruptions

stratovolcano 423 m / 1,388 ft
Izu Islands (Japan), 32.45°N / 139.76°E
Eruption list: 1781-85, 1670-80, 1652, 600 BC ± 200 years, 1100 BC ± 300 years, 1200 BC ± 50 years, 1800 BC ± 100 years


1781-85 eruption (Tenmei eruption)

Following a year of increased hydrothermal activity since 1780, earthquakes and small ash eruptions occurred on 3 and 4 May 1781. On 10 and 11 April 1783, a strong strombolian-lava fountain eruption started and built a new scoria cone inside the crater. 61 houses were burned and there were 7 fatalities.
Similarly, on 18 April 1785, strong strombolian eruptions resumed and built a second cone in the crater. The eruption caused 130-140 fatalities (although details are not known), while 163 residents escaped to Hachijo-jima Island. The eruption also produced lava flows inside Ikenosawa Crater.
From historic documents, it seems that by 1787 the eruption had ended.
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Source:
Takada et al (1992) "Geology of Aogashima Volcano, Izu Islands, Japan", Bulletin of the Volcanological Society of Japan 37(5), pp. 233-250
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