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Baitoushan

Volcano
Astronaut photograph ISS006-E-43366 acquired April 4, 2003 (ISS Crew Earth Observations experiment and the Image Science & Analysis Group, Johnson Space Center)
Astronaut photograph ISS006-E-43366 acquired April 4, 2003 (ISS Crew Earth Observations experiment and the Image Science & Analysis Group, Johnson Space Center)
Changbaishan (or Baitoushan) volcano is a large stratovolcano at the NE China - N Korean border and is and the most active in China. It is also known as Tianchi, or in Korean as Baegdu or P'aektu-san (Paektusan) volcano. One of the largest explosive eruptions in the world during the past 10,000 years occurred around 969 ±20 AD and is known as the Baitoushan eruption. It erupted about 30 cubic km of magma, about half as much as Tambora in 1815 AD or 3 times as much as Krakatau in 1883. The eruption produced rhyolitic and trachytic pumice and ash fall as far as northern Japan, and formed part of the present-day caldera. Small eruptions have been recorded in historic times since the 15th century, the last being a small explosion in April 1903. Out of China's 14 active volcanoes, Baitoushan is considered the most dangerous volcano. The major hazard are lahars from the huge lake in the 5-km-wide caldera that could threaten the mostly Korean population of about 100,000 living near or on the slopes of the volcano, as well as the many tourists visiting the volcano in summer.
Volcano type stratovolcano restless
Location
Summit elevation 2744 m / 9,003 ft
Baitoushan volcano eruptions 1903, 1898, 1702, 1668, 1597 (?), 1413 (?), 969 AD ±20 (large Plinian eruption VEI 7), 180 BC ± 75 years, 1000 BC (?), 2160 BC ± 100 years
Typical eruption style explosive
Changbaishan is relatively poorly known, due to its remote location. It contains a 5-km-wide, 850-m-deep summit caldera occupied by scenic Lake Tianchi ("Sky Lake").

The volcano has a diameter of 60 km and is composed dominantly of trachytic and rhyolitic lavas, overlying an older shield volcano known as the Changbaishan or Laoheidingzi shield volcano. There are numerous flank cones on a NNE rift zone.



Sources:

- Smithsonian / GVP Changbaishan volcano information

- Horn S, Schmincke H (2000) "Voltatile emission during the eruption of Baitoushan volcano (China/North Korea) ca. 969 AD" Bull Volc, v. 61, pp. 537-555

- V. G. Sakhno (2007) "Chronology of eruptions, composition, and magmatic evolution of the Paektusan Volcano: Evidence from K-Ar, 87Sr/86Sr, and δ18O isotope data", Geology, v. 412 (1), pp. 22-28

- Miyamoto T (2002) "The time sequence of eruption of Baitoushan volcano in 10th century and folktales about the eruption", Japan Geoscience Union Meeting 2002, Abstract V032-003

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