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Japan · Complex volcano

Mount Asama

Asamayama

Type
Complex volcano
Elevation
2568m
Last eruption
2019
Mount Asama
Photo: Yu.nakai · CC BY-SA 3.0 · Wikimedia Commons
Type
Complex volcano
Country
Japan
Region
Northwestern Pacific / Northeast Japan Volcanic Arc
Elevation
2568m
Coordinates
36.406, 138.523
Last eruption
2019
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Andesite / Basaltic andesite
Geological summary

Asamayama, Honshu's most active volcano, overlooks the resort town of Karuizawa, 140 km NW of Tokyo. The volcano is located at the junction of the Izu-Marianas and NE Japan volcanic arcs. The modern Maekake cone forms the summit and is situated east of the remnant of an older andesitic volcano, Kurofuyama, which was destroyed by a late-Pleistocene landslide about 20,000 years before present (BP). Growth of a dacitic shield volcano was accompanied by pumiceous pyroclastic flows, the largest of which occurred about 14,000-11,000 BP, and by growth of the Ko-Asamayama lava dome on the east flank. Maekake, capped by the Kamayama pyroclastic cone that forms the present summit, is probably only a few thousand years old and has observed activity dating back at least to the 11th century CE. Maekake has had several major Plinian eruptions, the last two of which occurred in 1108 (Asamayama's largest Holocene eruption) and 1783 CE.

From Wikipedia

Mount Asama is an active stratovolcano in central Honshū, the main island of Japan. The volcano is the most active on Honshū. The Japan Meteorological Agency classifies Mount Asama as rank A. It stands 2,568 metres (8,425 ft) above sea level on the border of Gunma and Nagano prefectures. It is included in 100 Famous Japanese Mountains.

Wikipedia · CC BY-SA · Read full article →

Eruption history

145 recordedGlossary
Summary (VEI over time)
Click a bar to see individual eruptions · Use arrow keys to move between bars, Enter to open
7200 BCE~6893 BCE · 1 eruptions · max VEI ?6585 BCE~6278 BCE · 1 eruptions · max VEI ?4742 BCE~4434 BCE · 1 eruptions · max VEI ?4127 BCE~3820 BCE · 1 eruptions · max VEI ?3512 BCE~3205 BCE · 1 eruptions · max VEI 32590 BCE~2283 BCE · 1 eruptions · max VEI 41361 BCE~1054 BCE · 1 eruptions · max VEI ?175~483 · 1 eruptions · max VEI 4483~790 · 1 eruptions · max VEI 31097~1404 · 3 eruptions · max VEI 51404~1712 · 45 eruptions · max VEI 31712~2019 · 88 eruptions · max VEI 47200 BCE5049 BCE2590 BCE439 BCE1712

Detailed timeline

  1. 2019VEI 2Observed
    2019-08-07 – 2019-08-25
  2. 2015VEI 1Observed
    2015-06-16 – 2015-06-19
    Summit crater
  3. 2009VEI 2Observed
    2009-01-21 – 2009-05-02
  4. 2008VEI 1Observed
    2008-08-10 – 2008-08-14
  5. 2004VEI 2Observed
    2004-09-01 – 2004-12-09
  6. 2003VEI 1Observed
    2003-02-06 – 2003-04-18
  7. 1990VEI 2Observed
    1990-07-20 – 1990-07-20
  8. 1983VEI 2Observed
    1983-04-08 – 1983-04-08
  9. 1982VEI 2Observed
    1982-04-26 – 1982-04-26
  10. 1982VEI 1Observed
    1982-10-02 – 1982-10-02
  11. 1973VEI 2Observed
    1973-02-01 – 1973-05-24
  12. 1965VEI 2Observed
    1965-05-23 – 1965-05-23
  13. 1961VEI 2Observed
    1961-08-18 – 1961-11-16
  14. 1958VEI 2Observed
    1958-10-03 – 1959-08-26
  15. 1953VEI 3Observed
    1953-12-27 – 1955-08-02
  16. 1952VEI 1Method not stated
    1952-01-16 – 1952-01-16
  17. 1952VEI 2Observed
    1952-06-07 – 1952-06-14
  18. 1950VEI 1Observed
    1950-09-23 – 1951-06-17
  19. 1949VEI 2Observed
    1949-03-10 – 1949-10-24
  20. 1947VEI 1Observed
    1947-06-16 – 1947-08-14
    E corner of crater bottom
  21. 1946VEI 2Observed
    1946-10-29 – 1946-10-30
  22. 1944VEI 2Observed
    1944-01-16 – 1945-11-16
  23. 1938VEI 1Observed
    1938-03-25 – 1942-12-16
  24. 1934VEI 1Observed
    1934-01-09 – 1934-02-11
  25. 1934VEI 1Observed
    1934-06-16 – 1934-06-16
  26. 1934VEI 3Observed
    1934-11-13 – 1937-07-16
  27. 1933VEI 2Observed
    1933-01-09 – 1933-08-03
  28. 1931VEI 3Observed
    1931-03-31 – 1932-09-21
  29. 1930VEI 2Observed
    1930-04-18 – 1930-10-17
  30. 1929VEI 2Observed
    1929-01-22 – 1929-04-05
  31. 1929VEI 2Observed
    1929-09-18 – 1929-11-15
  32. 1927VEI 2Observed
    1927-03-16 – 1928-07-25
  33. 1924VEI 2Observed
    1924-09-07 – 1924-09-29
  34. 1920VEI 2Observed
    1920-12-06 – 1922-04-05
  35. 1919VEI 2Observed
    1919-03-14 – 1919-08-27
  36. 1918VEI ?Method not stated
    1918-07-02 – end unknown
  37. 1917VEI 1Observed
    1917-05-03 – 1917-07-31
  38. 1916VEI 1Observed
    1916-05-12 – 1916-10-02
  39. 1915VEI 1Observed
    1915-05-13 – 1915-08-27
  40. 1914VEI 2Observed
    1914-11-12 – 1914-12-16
  41. 1909VEI 1Observed
    1909-01-29 – 1914-06-24
  42. 1908VEI 2Observed
    1908-02-13 – 1908-02-19
  43. 1908VEI 2Observed
    1908-08-05 – 1908-09-23
  44. 1907VEI 2Observed
    1907-01-18 – 1907-03-28
  45. 1907VEI 2Observed
    1907-08-24 – 1907-08-24
  46. 1906VEI 2Observed
    1906-04-06 – 1906-04-06
  47. 1905VEI ?Method not stated
    1905-07-02 – end unknown
  48. 1904VEI 2Observed
    1904-08-04 – 1904-08-04
  49. 1903VEI 2Method not stated
    1903-05-28 – 1903-06-30
  50. 1902VEI 2Observed
    1902-02-07 – 1902-02-07
  51. 1902VEI 2Observed
    1902-08-05 – 1902-08-20
  52. 1900VEI 2Observed
    1900-01-22 – 1901-10-16
  53. 1899VEI 2Observed
    1899-03-11 – end unknown
  54. 1899VEI 2Observed
    1899-07-10 – 1899-08-07
  55. 1894VEI 2Observed
    1894-04-06 – 1894-06-14
  56. 1892VEI ?Method not stated
    1892-07-02 – end unknown
  57. 1891VEI ?Observed
    1891-10-16 – 1891-11-16
  58. 1889VEI 2Observed
    1889-12-24 – end unknown
  59. 1879VEI 2Observed
    1879-09-27 – 1879-09-28
  60. 1878VEI 2Method not stated
    1878-07-02 – end unknown
  61. 1875VEI 2Observed
    1875-06-14 – end unknown
  62. 1869VEI 2Observed
    1869-05-16 – 1869-10-23
  63. 1815VEI 3Observed
    1815-02-28 – end unknown
  64. 1803VEI 2Observed
    1803-07-04 – end unknown
  65. 1803VEI 2Observed
    1803-11-07 – 1803-11-21
  66. 1783VEI 4Observed
    1783-05-09 – 1783-08-05
  67. 1779VEI ?Method not stated
    1779-09 – end unknown
  68. 1777VEI 2Observed
    1777 – end unknown
  69. 1776VEI 2Observed
    1776-09-05 – end unknown
  70. 1769VEI ?Method not stated
    1769-08-06 – end unknown
    Volcano Uncertain
  71. 1762VEI 2Observed
    1762-04 – end unknown
  72. 1755VEI 2Observed
    1755-07-05 – 1755-08-06
  73. 1754VEI 2Observed
    1754-08-07 – 1754-08-19
  74. 1752VEI 2Observed
    1752-09 – 1752-10
  75. 1733VEI 2Observed
    1733-07-30 – end unknown
  76. 1732VEI 2Observed
    1732-07-30 – end unknown
  77. 1731VEI 2Observed
    1731 – end unknown
  78. 1729VEI 2Observed
    1729-02 – end unknown
  79. 1729VEI 2Observed
    1729-11 – 1729-12
  80. 1728VEI 2Observed
    1728-11-10 – end unknown
  81. 1723VEI 2Observed
    1723-08-20 – end unknown
  82. 1722VEI 2Observed
    1722-11-18 – 1723-02-05
  83. 1721VEI 1Observed
    1721-06-22 – end unknown
  84. 1720VEI 2Observed
    1720-06-06 – end unknown
  85. 1719VEI ?Method not stated
    1719-06-10 – 1719-06-11
    Volcano Uncertain
  86. 1718VEI 2Observed
    1718-09-26 – end unknown
  87. 1717VEI 2Observed
    1717-09-23 – end unknown
  88. 1713VEI 2Observed
    1713-06-29 – end unknown
  89. 1711VEI 2Observed
    1711-04-13 – end unknown
  90. 1710VEI 2Observed
    1710-03-25 – 1710-04-13
  91. 1708VEI 2Observed
    1708-12-29 – 1709-01-08
  92. 1706VEI 2Observed
    1706-11-20 – end unknown
  93. 1704VEI 2Observed
    1704-02-05 – 1704-02-09
  94. 1703VEI 2Observed
    1703 – end unknown
  95. 1695VEI 2Observed
    1695-06-23 – end unknown
  96. 1669VEI 2Observed
    1669-04-05 – 1669-04-15
  97. 1661VEI 2Observed
    1661-04-14 – 1661-04-27
  98. 1661VEI 2Observed
    1661-10-21 – end unknown
  99. 1660VEI 2Observed
    1660-04-08 – end unknown
  100. 1659VEI 2Observed
    1659-07-24 – end unknown
  101. 1658VEI 2Observed
    1658-07-24 – end unknown
  102. 1657VEI 2Observed
    1657-11-25 – end unknown
  103. 1656VEI 2Observed
    1656-12-10 – end unknown
  104. 1655VEI 2Observed
    1655-11-25 – end unknown
  105. 1653VEI 2Method not stated
    1653 – 1654
  106. 1652VEI 2Observed
    1652-04-12 – end unknown
  107. 1651VEI 2Observed
    1651-04-12 – end unknown
  108. 1650VEI 2Method not stated
    1650-07-02 – end unknown
  109. 1649VEI 2Observed
    1649-08-17 – 1649-08-18
  110. 1648VEI 2Observed
    1648-03-20 – end unknown
  111. 1648VEI 2Observed
    1648-08-30 – end unknown
  112. 1647VEI 2Observed
    1647-02-18 – 1647-03-25
  113. 1645VEI 2Observed
    1645-02-24 – 1645-05-21
  114. 1644VEI 2Observed
    1644-02-20 – end unknown
  115. 1609VEI 2Observed
    1609-04-05 – end unknown
  116. 1605VEI 2Observed
    1605-12 – 1606-02
  117. 1604VEI 2Method not stated
    1604 – end unknown
  118. 1600VEI 3Observed
    1600-01-14 – 1600-01-28
  119. 1598VEI 2Observed
    1598-05-13 – end unknown
  120. 1597VEI 2Observed
    1597-04-17 – end unknown
  121. 1596VEI 3Observed
    1596-05-01 – 1596-09
  122. 1595VEI 2Observed
    1595-06-01 – end unknown
  123. 1591VEI 2Observed
    1591-04-15 – end unknown
  124. 1591VEI 3Observed
    1591-11-29 – end unknown
  125. 1590VEI 2Observed
    1590-04-15 – end unknown
  126. 1582VEI 2Observed
    1582-02-16 – end unknown
  127. 1582VEI 2Observed
    1582-07-03 – end unknown
  128. 1534VEI ?Method not stated
    1534 – end unknown
  129. 1532VEI ?Method not stated
    1532-01-14 – end unknown
  130. 1528VEI 2Observed
    1528 – end unknown
  131. 1527VEI 2Observed
    1527-05 – end unknown
  132. 1518VEI ?Method not stated
    1518 – end unknown
  133. 1427VEI ?Method not stated
    1427-07-07 – end unknown
  134. 1281VEI 3Method not stated
    1281-07-03 – end unknown
  135. 1128VEI ?Method not stated
    1128 – end unknown
  136. 1108VEI 5Observed
    1108-08-29 – 1108-10
  137. 685VEI 3Method not stated
    685-04 – end unknown
    Volcano Uncertain
  138. 350 (±10 yrs)VEI 4Geological estimate
    350-11-15 – end unknown
  139. 1130 BCE (±1430 yrs)VEI ?Geological estimate
    1130 BCE – end unknown
  140. 2550 BCE (±500 yrs)VEI 4Geological estimate
    2550 BCE – end unknown
  141. 3450 BCEVEI 3Geological estimate
    3450 BCE – end unknown
  142. 4100 BCE (±100 yrs)VEI ?Geological estimate
    4100 BCE – end unknown
  143. 4700 BCE (±500 yrs)VEI ?Geological estimate
    4700 BCE – end unknown
  144. 6400 BCE (±1050 yrs)VEI ?Geological estimate
    6400 BCE – end unknown
  145. 7200 BCE (±200 yrs)VEI ?Geological estimate
    7200 BCE – end unknown

Nearby volcanoes

External links

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