February Active volcanic activity status nationwide 7 "Crater area warning" for 7 volcanoes

[NHK] On the 8th, the Japan Meteorological Agency announced the activity status of active volcanoes nationwide and points to be watched for in February. If an eruption is occurring or volcanic activity is increasing ...

On the 8th, the Japan Meteorological Agency announced the activity status of active volcanoes nationwide and points to watch out for in February.

"Crater area warning" has been announced for seven volcanoes nationwide, and "eruption warning (peripheral sea area)" has been announced for one submarine volcano as eruptions are occurring and volcanic activity is increasing.

7 volcanoes around the crater

The "crater area warning" has been announced because the eruption may affect the area around the crater and the area where you live.

▽ "Mt. Shirane" on

Mt.

Kusatsu-Shirane in Gunma Prefecture ▽

"Sakurajima" in Kagoshima Prefecture "

▽" Kuchinoerabujima "

▽" Iwo Jima Satsuma "

▽" Suwanosejima "

is ▽ total of 7 volcano of" Nishinoshima "and" Iwo Jima "of the Ogasawara Islands.

Volcanic Alert Level 3 is 2 volcanoes

Of these, eruption alert level 3, which indicates "mountain entry restrictions" that may affect the vicinity of the place of residence, has been announced on "Sakurajima" and "Kuchinoerabujima".

Eruptive activity continued at the Minamidake summit crater of Sakurajima, and large volcanic blocks reached the 5th station from 1000 meters to 1400 meters from the crater, and the eruption smoke rose to 2300 meters from the crater at the maximum.

According to the Japan Meteorological Agency, eruptive activity tends to increase slowly in Sakurajima.

In addition, the eruptive activity can be further activated because the magma supplied for a long period of time continues to accumulate under the Aira Caldera in Kagoshima Bay and the amount of volcanic gas released continues to be high. It is said that there is sex.

The Japan Meteorological Agency calls for caution against large volcanic bombs and pyroclastic flows within a range of approximately 2 km from the Minamidake summit crater and Showa crater.

<Kuchinoerabu Island> On

Kuchinoerabu Island, since February 21, the number of volcanic earthquakes originating from shallow areas near the crater of Shindake has increased, and volcanic activity has increased. Announced a crater area warning on February 28, raising the eruption alert level from 2 to 3.

The Japan Meteorological Agency warns against large volcanic bombs and pyroclastic flows within a range of approximately 2 km from the crater, and warns against pyroclastic flows from the crater to the southwest of Shindake from the Mukaihama area to the coast.

Volcanic Alert Level 2 is 3 volcanoes

Eruption alert level 2 that restricts access to the crater area

has been announced at three volcanoes: ▽

Mt.

Kusatsu-Shirane,

▽ "Satsuma Iojima," and

▽ "Suwanosejima."

<Suwanosejima> At

the Ontake crater on Suwanosejima, a rather active eruptive activity continued, and with the explosion on March 6, large volcanic bombs reached a maximum of about 900 meters from the crater.

Since March 2, explosions have increased and volcanic activity has increased.

The Japan Meteorological Agency is calling for caution against large volcanic bombs within a range of approximately 1 km from the crater.

<Satsuma Iojima> The

Japan Meteorological Agency began operating a new alert range for Satsuma Iojima on March 8, and in the case of eruption alert level 2, it has been reduced from a range of 1 km from the crater to 500 meters.

On Satsuma Iojima, there is no particular change in the occurrence of volcanic earthquakes and tremors, but a "fire phenomenon" was observed at night, and the eruption of smoke occasionally increased, resulting in increased thermal activity over the long term. Is continuing.

The Japan Meteorological Agency is calling for caution against large volcanic bombs within a range of approximately 500 meters from the crater.

<Mt. Shirane of Mt.

Kusatsu-

Shirane> At

"Mt. Shirane" of Mt. Kusatsu-Shirane, volcanic earthquakes are continuously occurring in the shallow part near the Yugama, and it is thought that hydrothermal activity is also continuing.

The Japan Meteorological Agency has said that small-scale steam eruptions may continue to occur, and is calling for caution against large volcanic bombs within a range of approximately 1 km from the Yugama crater.

2 volcanoes around the crater

Although the eruption alert level has not been introduced, the "crater area warning" has been announced for "Nishinoshima" and "Iwojima" in the Ogasawara Islands.

No eruptions have been observed on Nishinoshima since late August 2020.

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 has continued 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.

On Iwo Jima, which is estimated to have had a seafloor 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 as a whole on the island, and there are many fumaroles, etc., 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)" at Fukutoku Okanoba

At "Fukutoku-Okanoba", a submarine volcano 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.

Shinmoedake reduced to level 1

At Shinmoedake in the Kirishima mountain range, the number of volcanic earthquakes with epicenters directly below the crater increased from December 2020 and continued to be high, but it gradually decreased from January and has been low since last month. ..

For these reasons, the Japan Meteorological Agency lowered the eruption alert level from 2 to 1 on the 1st.

The Japan Meteorological Agency continues to pay attention to the eruption of volcanic ash and volcanic gas near the crater and the cracks on the western slope, and urges people to stay out of dangerous areas according to the instructions of the local government.

No eruption warning, eruption alert level 1 is also an active volcano

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 in June 2020 and volcanic tremors.

It is also necessary to recognize again that a sudden eruption can occur in the absence of any noticeable signs.

Check the latest information

You can check the activity status and precautions of volcanoes in each area on the Japan Meteorological Agency, meteorological stations in each area, and the websites of local governments.