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Asama volcano (Honshu, Japan): Volcanic Alert Level raised to Level 2

Thu, 1 Apr 2021, 10:04
10:04 AM | BY: MARTIN
Webcam image of Asama volcano today (image: JMA)
Webcam image of Asama volcano today (image: JMA)
The Japan Meteorological Agency (JMA) raised the alert level for the volcano to level 2, as an elevated seismic activity and slight inflation has been recorded.
Since 15 March the seismic station recorded a slight ground deformation on the western flank of the volcano indicating magma moving upwards through the volcanic conduits.
Since 20 March an increase of volcano-tectonic earthquakes was detected as the instruments recorded 36 and 77 events (23 March) respectively. Since 23 March the seismic activity began to fluctuate to 15 quakes/day and raised again to 23 quakes/day on 29 March.
Average value of sulfur dioxide (SO2) emissions reached to a 650 tonnes/day during 22-25 March.
The warning bulletin states that ballistic impacts of volcanic bombs could affect an area of about 2 km distance from the main crater.
Source: Japan Meteorological Agency volcano activity update 1 April 2021

Previous news

Wed, 24 Mar 2021, 06:00

Asamayama volcano (Honshu, Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 24 March-30 March 2021 (New Activity / Unrest)

On 23 March JMA raised the Alert Level for Asamayama to 2 (on a scale of 1-5), noting slight inflation on the W side of the volcano since 15 March and an increase in the number of daily volcanic earthquakes that have occurred since 20 March (36 recorded on 20 March and increasing to 77 events by 1500 on 23 March). After 23 March the number of daily volcanic earthquakes began to fluctuate, decreasing to 15 on 28 March and then 23 by 1500 on 29 March. The sulfur dioxide emission rate was 800 tons per day (t/d) on 22 March, 400 t/d on 24 March, and 700 t/d on 25 March, compared to the previous measurement of 200 t/d on 25 February. ... Read all
Fri, 5 Feb 2021, 08:08

Asama volcano (Honshu, Japan): Volcanic Alert Level lowered to Level 1

Asama volcano today (image: JMA)
The alert level for the volcano was lowered to Level 1, as a low-level activity continues. ... Read all
Show more

Asama volcano (Honshu, Japan): Volcanic Alert Level raised to Level 2

Thu, 1 Apr 2021, 10:04
10:04 AM | BY: MARTIN
Webcam image of Asama volcano today (image: JMA)
Webcam image of Asama volcano today (image: JMA)
The Japan Meteorological Agency (JMA) raised the alert level for the volcano to level 2, as an elevated seismic activity and slight inflation has been recorded.
Since 15 March the seismic station recorded a slight ground deformation on the western flank of the volcano indicating magma moving upwards through the volcanic conduits.
Since 20 March an increase of volcano-tectonic earthquakes was detected as the instruments recorded 36 and 77 events (23 March) respectively. Since 23 March the seismic activity began to fluctuate to 15 quakes/day and raised again to 23 quakes/day on 29 March.
Average value of sulfur dioxide (SO2) emissions reached to a 650 tonnes/day during 22-25 March.
The warning bulletin states that ballistic impacts of volcanic bombs could affect an area of about 2 km distance from the main crater.
Source: Japan Meteorological Agency volcano activity update 1 April 2021

Previous news

Wed, 24 Mar 2021, 06:00

Asamayama volcano (Honshu, Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 24 March-30 March 2021 (New Activity / Unrest)

On 23 March JMA raised the Alert Level for Asamayama to 2 (on a scale of 1-5), noting slight inflation on the W side of the volcano since 15 March and an increase in the number of daily volcanic earthquakes that have occurred since 20 March (36 recorded on 20 March and increasing to 77 events by 1500 on 23 March). After 23 March the number of daily volcanic earthquakes began to fluctuate, decreasing to 15 on 28 March and then 23 by 1500 on 29 March. The sulfur dioxide emission rate was 800 tons per day (t/d) on 22 March, 400 t/d on 24 March, and 700 t/d on 25 March, compared to the previous measurement of 200 t/d on 25 February. ... Read all
Fri, 5 Feb 2021, 08:08

Asama volcano (Honshu, Japan): Volcanic Alert Level lowered to Level 1

Asama volcano today (image: JMA)
The alert level for the volcano was lowered to Level 1, as a low-level activity continues. ... Read all
Show more
Asama volcano
complex volcano 2568 m / 8,425 ft
Honshu (Japan), 36.4°N / 138.53°E
Current status: normal or dormant (1 out of 5) Asama volcano eruptions:
2019, 2015, 2009, 2008, 2004, 2003, 1990, 1983, 1982, 1982, 1973, 1965, 1961, 1958-59, 1953-55, 1952, 1952, 1950-51, 1949, 1947, 1946, 1944-45, 1938-42, 1935-37, 1934, 1934, 1933, 1931-32, 1930, 1929, 1929, 1927-28, 1924, 1922, 1920-21, 1919, 1918(?), 1917, 1916, 1915, 1914, 1909-14, 1908, 1908, 1907, 1907, 1906, 1905(?), 1904, 1903, 1902, 1902, 1900-01, 1899, 1899, 1894, 1889, 1879, 1878(?), 1875, 1869, 1815, 1803, 1803, 1783, 1779(?), 1777, 1776, 1769, 1762, 1755, 1754, 1733, 1732, 1731, 1729, 1729, 1728, 1723, 1723, 1722, 1721, 1720, 1719, 1718, 1717, 1711, 1710, 1708-09, 1706, 1704, 1703, 1669, 1661, 1661, 1660, 1659, 1658, 1657, 1656, 1655, 1653, 1652, 1651, 1650(?), 1649, 1648, 1648, 1647, 1645, 1644, 1609, 1605, 1604, 1600, 1598, 1597, 1596, 1596, 1595(?), 1591, 1590, 1532, 1528, 1527, 1518, 1427(?), 1281, 1108, 887, 685
Typical eruption style
explosive
Assama volcano satellite image by (c) Google Earth View & VolcanoDiscovery
Assama volcano satellite image by (c) Google Earth View & VolcanoDiscovery
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