On the 8th, the Japan Meteorological Agency announced the activity status of active volcanoes nationwide in January and points to be wary of.
"Crater area warning" has been announced for eight volcanoes nationwide, and "eruption warning (peripheral sea area)" has been announced for one submarine volcano as eruptions are occurring and volcanic activity is increasing.
8 volcanoes around the crater
"Crater area warning" has been announced because future eruptions may affect the area around the crater and the area where you live.
▽
"Mt. Shirane" of
Mt.
Kusatsu-Shirane in Gunma Prefecture
▽ Kagoshima and Miyazaki "Shinfundake" in the Kirishima mountain range on the prefectural border
▽ "Sakurajima" in Kagoshima Prefecture
▽ "Kuchinoerabu
Island"
▽ "
Satsuma Iojima"
▽ "Suwanosejima"
▽ "Nishinojima" and "Iojima" in the Ogasawara Islands There are 8 volcanoes in total.
"Volcanic Alert Level 3" Sakurajima
Of these, eruption alert level 3 indicating "mountain entry restrictions" has been announced in "Sakurajima" because it may affect the vicinity of the place of residence.
<Sakurajima> There were 21 eruptions at the summit crater of Mt. Minamidake in Sakurajima, of which 18 were explosive.
Large volcanic bombs reached the 4th station, up to 1300 to 1700 meters from the crater, and eruptions rose up to 2300 meters from the crater.
According to the Japan Meteorological Agency, eruptive activity tends to gradually increase in Sakurajima.
In addition, the eruptive activity may become more active because the magma supplied for a long period of time continues to accumulate beneath the Aira Caldera in Kagoshima Bay and the amount of volcanic gas released continues to be high. There is.
The Japan Meteorological Agency is calling for caution against large volcanic bombs and pyroclastic flows within a range of approximately 2 km from the Minamidake summit crater and Showa crater.
"Volcanic Alert Level 2" 5 volcanoes
Eruption alert level 2 where access to the crater area is restricted is
▽
"Mt.
Shirane
" of Mt.
Kusatsu-Shirane ▽
"Shinmoedake" of the Kirishima mountain range
▽ "Satsuma
Ioshima
"
▽ "Kuchinoerabu
Island
"
▽ "Suwanosejima" It has been announced in 5 volcanoes.
<Kuchinoerabu Island> On
Kuchinoerabu Island, volcanic earthquakes with epicenters in shallow areas near the crater of Shindake have repeatedly increased and decreased, but have been on a downward trend since around November last year. Therefore, no large-scale volcanic earthquakes have been observed.
In addition, no particular changes indicating the activation of volcanic activity have been observed from the conditions such as the eruption around the crater.
As a result, the eruption alert level was reduced from 3 to 2 on January 19.
The Japan Meteorological Agency is
calling for caution against
large volcanic bombs and pyroclastic flows within a range of approximately 1 km from the crater of Shindake, and
to be wary of pyroclastic flows within a range of approximately 2 km to the west of the crater.
<Suwanosejima>
Active eruptive activity continues at the Mitake crater on Suwanosejima, but since December 29, last year, eruptions such as large volcanic bombs scattered over 1 km from the crater have been observed. However, the eruption alert level was lowered from 3 to 2 on January 14, as there was no significant change in the crustal movement data.
The Japan Meteorological Agency is calling for caution against large volcanic bombs within a range of approximately 1 km from the crater.
<Mt. Shirane of Mt.
Kusatsu-
Shirane> At
"Mt. Shirane" of Mt. Kusatsu-Shirane, volcanic earthquakes have occurred in the shallow part near the Yugama with a little less volcanic earthquakes, and hydrothermal activity is continuing.
The Japan Meteorological Agency says that small-scale steam eruptions may continue to occur.
The Japan Meteorological Agency is calling for caution against large volcanic bombs within a range of approximately 1 km from the Yugama crater.
<Shinmoedake in the
Kirishima Mountain Range
> At Shinmoedake in the
Kirishima Mountain Range, volcanic earthquakes with epicenters directly below the crater have been increasing and decreasing since around 2019, and have increased again since December 18, last year.
The number of volcanic earthquakes has decreased slightly since January, but has occurred intermittently, and volcanic activity has continued to increase slightly.
The Japan Meteorological Agency is calling for caution against large volcanic bombs within a range of approximately 2 km from the crater and pyroclastic flows within a range of approximately 1 km.
<Satsuma Iojima>
No eruption has been observed on Satsuma Iojima since October 7, last year.
There is no particular change in volcanic earthquakes and volcanic tremors, but the "fire phenomenon" is observed at night, and the eruption of smoke sometimes rises, and the thermal activity continues to increase for a long time.
The Japan Meteorological Agency is calling for caution against large volcanic bombs within a range of approximately 1 km from the crater.
"Alarm without level" 2 volcano
Although the eruption alert level has not been introduced, the "crater area warning" has been announced for "Nishinoshima" and "Iwojima" in the Ogasawara Islands.
<Nishinoshima>
No eruptions have been observed on Nishinoshima since late August last year.
Although volcanic activity is declining, there are fumaroles and high temperature areas inside the summit crater, and it is possible that eruptions will resume in the future.
The Japan Meteorological Agency continues to warn around the crater, which indicates "danger of entering the mountain," and is calling for caution against large volcanic bombs and lava flows within a range of approximately 1.5 km from the summit crater.
<Iwo Jima>
On Iwo Jima, which is estimated to have had a submarine eruption in September 2018, crustal movements indicating uplift of the entire island have been observed for a long period of time, and volcanic activity has remained somewhat active.
In addition, the ground temperature is high on the whole island, and there are many fumaroles, and small-scale eruptions have occurred in the past.
The Japan Meteorological Agency is calling for caution, saying that an eruption that affects the area around the crater may occur.
"Eruption warning (surrounding sea area)" in "Fukutoku Okanoba"
At the submarine volcano "Fukutoku Okanoba" near the Ogasawara Islands, an "eruption warning (surrounding sea area)" has been announced as there is a risk of an eruption affecting the surrounding sea area.
According to the observations made by the Japan Coast Guard and others, discoloration that seems to be caused by volcanic activity has been confirmed on the surrounding sea surface for a long period of time.
The Japan Meteorological Agency is calling for caution in the surrounding waters as a small submarine eruption is expected.
Mount Asama lowered to level 1
At Mt. Asama, the number of volcanic earthquakes is rather small, and the amount of eruption and volcanic gas emitted is also small.
Also, no crustal movements, which are thought to indicate expansion on the western side of the mountain, have been observed.
For these reasons, the eruption alert level was lowered from 2 to 1 on February 5.
The Japan Meteorological Agency may continue to have a very small eruption that affects the area 500 meters from the crater, and is urging people to stay out of dangerous areas according to the instructions of local governments.
No alarm Level 1 also risk awareness
No eruption warning has been announced among active volcanoes nationwide, and there are volcanoes with an eruption alert level of 1, but they are still active volcanoes that have repeatedly erupted in the past.
At Tokachidake in Hokkaido, volcanic activity has changed even at level 1 such as the first fire projection since 2000 was observed in June last year and volcanic tremors were observed.
It is also necessary to recognize again that a sudden eruption can occur in the absence of any noticeable precursors.
Check the latest information
You can check the activity status and precautions of volcanoes in each area on the Japan Meteorological Agency, meteorological observatories in each area, and the websites of local governments.