The Volcano Adventure Guide: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.
Zao volcano is the most active volcano of northern Honshu and consists of a group of stratovolcanoes forming the crest of the divide between the Pacific Ocean and the Japan Sea.
The older parts of the complex are Ryuzan volcano in the west and Byobu and Fubo volcanoes forming the southern group. Zao volcano proper (Chuo-Zao) is the youngest edifice and forms the central part of the group. One of its youngest summit lava domes is Goshiki-dake, which contains the active Okama crater, the source of most of the frequent historical eruptions recorded since the 8th century AD.
Okama crater contains a colorful, strongly acidic crater lake (pH 1.3).
comlex volcano 1841 m / 6,040 ft Honshu, Japan, 38.14°N / 140.44°E Current status: restless (2 out of 5) Zao webcams / live data Zao volcano books Zao volcano eruptions: 1940, 1939 (?), 1927 (?), 1905, 1897 (?), 1896, 1895, 1895, 1894, 1890 (?), 1873, 1867, 1833, 1831, 1830, 1822, 1821, 1809, 1806, 1804, 1796, 1794, 1694, 1670, 1669, 1668, 1641, 1630, 1623-24, 1622, 1620, 1400 ± 100 years (radiocarbon), 1350 (?), 1331-33 (?), 1230, 1227, 1183, 884, 773 (?), 300 AD ± 200 (RC), 1600 BC (?, RC), 2000 BC ± 500 (tephrochronology), 2300 BC ± 75 (RC), 2600 BC ± 200 (RC), 3350 BC ± 50 (RC), 3850 BC ± 200 (RC), 4150 BC ± 200 (RC), 5500 BC (?, RC), 5600 BC (?, RC), 7600 BC (?, RC) Typical eruption style: explosive (phreatic) Last earthquakes nearby Latest satellite images
Signs of unrest have been reported from the volcano. According to a news article, new episodes of volcanic tremor were detected under the volcano recently, believed to be signs of increased internal fluid movements. ...more
No volcanic earthquakes or significant deformation of the volcanic edifice have been recorded, that could suggest new magma rising, and currently, no eruption is expected to be likely in the near future. However, the volcano will now be observed with increased vigilance. [less]
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