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Asosan volcano (Kyushu, Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 9 March-15 March 2022 (New Activity / Unrest)

Thu, 17 Mar 2022, 09:52
09:52 AM | BY: VN
JMA reported that the amplitude of volcanic tremor signals at Asosan had decreased at around 1540 on 27 February and remained low. White plumes rose 600-800 m above the crater during 7-14 March. During field surveys conducted on 8 and 10 March sulfur dioxide gas emissions were 1,300 and 900 tons per day, respectively; these values were higher than those measured before the October 2021 eruption.
No other changes were observed. JMA lowered the Alert Level to 2 (on a scale of 1-5) on 14 March and warned the public to stay at least 1 km away from the crater.

Source: Japan Meteorological Agency (JMA)
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From: Global Volcanism Program, 2022. Report on Asosan. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 9 March-15 March 2022. Smithsonian Institution and US Geological Survey.

Previous news

Thu, 3 Mar 2022, 00:49

Asosan volcano (Kyushu, Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 23 February-1 March 2022 (New Activity / Unrest)

JMA reported that the amplitude of volcanic tremor signals at Asosan increased at around 0500 on 24 February and then increased again around 0900. About 45 minutes later JMA raised the Alert Level to 3 (on a scale of 1-5) and warned the public to stay at least 2 km away from the crater. Tremor amplitude decreased at around 1540 on 27 February. ... Read all
Sat, 26 Feb 2022, 01:53

Aso volcano (Kyushu Isl., Japan): dense gas and steam plumes today, Volcanic Alert Level raised to 3

Gas emissions at Aso volcano today (image: National Research Institute for Earth Science and Disaster Prevention)
The Japan Meteorological Agency (JMA) reported about strong-gas steam plume at the volcano at 10:00 local time today. ... Read all
Show more
Aso volcano
caldera 1592 m / 5,223 ft
central Kyushu, Japan, 32.88°N / 131.11°E
Current status: restless (2 out of 5) Aso volcano eruptions:
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
Typical eruption style
explosive
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