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Aso Volcano

Updated: 4 nov.. 2024 04:41 GMT -
caldera 1592 m / 5,223 ft
central Kyushu, Japan, 32.88°N / 131.11°E
Condition actuelle: en vigilance - niveau agité (2 sur 5)
Last update: 23 mai 2024 (Smithsonian / USGS Weekly Volcanic Activity Report)
The huge Aso caldera seen from space: 25 by 18 km in size, it was created by at least 4 huge eruptions between 270 to 90 thousand years ago (image: NASA Earth Observatory)
The huge Aso caldera seen from space: 25 by 18 km in size, it was created by at least 4 huge eruptions between 270 to 90 thousand years ago (image: NASA Earth Observatory)

Aso (or Asosan) volcano in central Kyushu Island in southwestern Japan is one of the world's most active volcanoes. In recent years, it has been the site of frequent ash eruptions.
Aso is no single edifice, but a complex of active vents in the center of a large 24 km wide caldera.

[smaller] [larger]
Style éruptif tipique: explosive
Eruptions du volcan Aso: 2021, 2019-2020, 2016, 2014-15, 2011 (May), 2005, 2004, 2003, 1994-95, 1992-93, 1989-91, 1988, 1984-85, 1983, 1981, 1980, 1979-80, 1977-78, 1975-76, 1973-75, 1970-72, 1967-69, 1964-66, 1964, 1963-64, 1963, 1960-62, 1960, 1959, 1957-58, 1957, 1956, 1955, 1954, 1953, 1952(?), 1951, 1950-51, 1949, 1948, 1947, 1946, 1945, 1943-44, 1943, 1942(?), 1940-41, 1938-39, 1937, 1936, 1935, 1934, 1932-33, 1931(?), 1930, 1928-29, 1926-28, 1925, 1923, 1920, 1919, 1918, 1916, 1914, 1911-12, 1910, 1909, 1908, 1907, 1906, 1898-99, 1897, 1894, 1884, 1874, 1872-73, 1856, 1854, 1838, 1837, 1835, 1830-32, 1830, 1829, 1828, 1827-28, 1827, 1826, 1816, 1815, 1814, 1806, 1804, 1781-88, 1772-80, 1765, 1753(?)-54, 1709, 1708(?), 1691, 1683, 1675, 1671, 1668-69, 1668, 1649, 1637, 1631, 1620, 1613, 1612, 1611, 1598-99, 1592, 1587, 1584, 1583, 1582, 1576, 1564, 1563(?), 1562, 1558-59, 1542, 1533, 1522, 1506, 1505, 1485, 1473-74, 1438, 1434, 1390(?) 1388(?), 1387, 1377, 1376, 1375-76, 1369, 1346, 1343, 1340, 1335, 1331-33, 1331, 1324, 1305, 1286, 1281, 1274, 1273, 1272, 1272, 1271, 1269, 1265, 1240, 1239, 1229, 986(?), 867, 864, 796(?), 553

Derniers séismes proches

No recent earthquakes
TimeMag. / DepthDistance / Location

Introduction

The 24-km-wide Aso caldera was formed during four major explosive eruptions from 300,000 to 90,000 years ago. These produced voluminous pyroclastic flows that covered much of Kyushu. The last of these, the Aso-4 eruption, produced more than 600 cu km of airfall tephra and pyroclastic-flow deposits. A group of 17 central cones was constructed in the middle of the caldera, one of which, Naka-dake, is one of Japan's most active volcanoes. It was the location of Japan's first documented historical eruption in 553 AD. The Naka-dake complex has remained active throughout the Holocene. Several other cones have been active during the Holocene, including the Kometsuka scoria cone as recently as about 210 AD. Historical eruptions have largely consisted of basaltic to basaltic-andesite ash emission with periodic strombolian and phreatomagmatic activity. The summit crater of Naka-dake is accessible by toll road and cable car, and is one of Kyushu's most popular tourist destinations.
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Source: GVP Aso volcano information

Aso Volcano Photos

Eruptions du volcan Aso



1997 fatalities
2 tourists were killed by volcanic gas 100 m south of the rim of Crater 1 on 23 November 1997. Since 1980, more than 70 people have been injured by volcanic gases at Aso and have been hospitalized.

1979 fatalities
3 people were killed and 11 injured by ballistic blocks ejected by an explosion that occurred at about 1pm local time on 6 September 1979.

Latest satellite images

Aso satellite image sat1Aso satellite image sat2
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jeu., 23 mai 2024, 06:00

Asosan volcano () - Smithsonian / USGS Weekly Volcanic Activity Report for 15 May-21 May 2024 (New Activity / Unrest)

JMA reported continuing unrest at Asosan. Sulfur dioxide gas emissions were somewhat high, averaging 1,600 tons per day (t/d), when measured during a field survey on 9 May. The amplitude of volcanic tremors began to increase at around 0600 on 15 May and increased again round 0900. ... Read all
mer., 29 mars 2023, 14:00

Asosan volcano (Kyushu, Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 22 March-28 March 2023 (Continuing Activity)

The amplitude of volcanic tremor signals at Asosan increased in December 2022, and then further intensified on 30 January, prompting JMA to raise the Alert Level to 2 (on a scale of 1-5) and warn the public to stay at least 1 km away from the crater. The amplitude fluctuated at high levels for a few weeks, and then decreased on 19 February and again on 14 March. Daily sulfur dioxide emissions had exceeded 1,000 tons per day starting in December 2022; emissions declined to below that threshold by mid-January and remained at lower levels. ... Read all

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