Contact | RSS | EN | DE | EL | ES | FR | IT | RU

Asosan volcano (Kyushu, Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 13 April-19 April 2022 (Continuing Activity)

Wed, 20 Apr 2022, 19:07
19:07 PM | BY: VN
JMA reported that no eruptions had been recorded at Asosan after the end of the last eruption in October 2021. Crater incandescence, which had been occasionally visible since December 2021, was absent beginning on 27 February. Deflation began around 27 February but stabilized in April.
Observations of the crater from 17 March revealed that it had deepened, compared to pre-eruption conditions, and that water had returned. Sulfur dioxide emissions had increased to 1,600 tons per day on 25 March, but four observations made during 29 March-12 April showed values in the range of 800-1,200 tons per day. Though these values were higher than those measured in September 2021, before the eruption, they represented a decreasing trend.
During a field visit on 7 April scientists observed white emissions rising from Nakadake Crater and gray pools of hot water on the crater floor. A hot spring was active on the S side of the pools. The area of the water represented about 40 percent of the crater floor and the water temperature was 71 degrees Celsius.
JMA lowered the Alert Level to 1 (on a scale of 1-5) on 15 April, noting that the likelihood of an eruption affecting an area within a radius of 1 km had decreased.

Source: Japan Meteorological Agency (JMA)
---
From: Global Volcanism Program, 2022. Report on Asosan. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 13 April-19 April 2022. Smithsonian Institution and US Geological Survey.

Previous news

Thu, 17 Mar 2022, 09:52

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

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. ... Read all
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
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
Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version

More on VolcanoDiscovery

Support us - Help us upgrade our services!

We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Design upgrade
  • Detailed quake stats
  • Additional seismic data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.
Use of material: Most text and images on our websites are owned by us. Re-use is generally not permitted without authorization. Contact us for licensing rights.
Volcanoes & Earthquakes
VolcanoDiscovery Home
Volcanoes | Earthquakes | Photos | Volcano News | App
Adventure & Study Travel
Tours to Volcanoes and Volcanic Areas: walking tours, photo tours, study tours
Tours & Dates | FAQ | About us
Get our newsletter!
Company info
Contact | Legal info | Terms & conditions
Follow us
Follow us on facebook Follow us on Instagram Follow us on Twitter Visit our Youtube channel
EN | DE | EL | ES | FR | IT | RU
VolcanoDiscovery GmbH, Germany, Reg. nr.: HRB 103744, EU Tax Id: DE 310 395 322 owned and created by
Dr. Tom Pfeiffer, volcanologist, volcano photographer, tour organizer member of
IAVCEI
Volcanological Society
Ecotourism Greece
Insured by R+V
VolcanoDiscovery © 2004- All Rights Reserved | Privacy - cookie settings