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Volcano overview nationwide 8 crater warnings for 8 volcanoes | NHK News

2019-10-08T11:10:35.448Z

The Japan Meteorological Agency announced the activity status of active volcanoes nationwide from September to October and points to watch out for on August 8. Eruptions occurred, volcanic activity ...



Volcano overview nationwide 8 “Volume around the crater” at 8 volcanoes Oct. 8 20:06

The Japan Meteorological Agency announced the activity status of active volcanoes nationwide from September to October and points to watch out for on August 8. As eruptions have occurred and volcanic activity is increasing, “Earth crater warning” has been announced for eight volcanoes nationwide, and “Eruption warning (peripheral sea area)” has been announced for one submarine volcano.

8 volcanoes around the crater

The crater area warning has been announced as a potential eruption may affect the vicinity of the crater and the residential area. ▽ "Shirane" of Kusatsu Shirane in Gunma Prefecture, ▽ Gunma and “Asama” on the border of Nagano, “Mt. Aso” in Kumamoto Prefecture, “Sakurajima” in Kagoshima Prefecture, “Kuchierabujima”, “Suwanosejima”, “Nishinoshima” in the Ogasawara Islands There are 8 volcanoes on Iwo Jima.

Eruption caution level 3 is 1 volcano

Of these, there is a risk of impacts close to the place of residence, and eruption warning level 3 indicating “Iriyama regulation” has been announced in “Sakurajima”.

<Sakurajima>
No eruptions were observed in August at Sakurajima's “Mt. Minamidake summit crater”, but 32 eruptions were observed in September, 11 of which were explosive eruptions. The volcanic plume rose up to 3400 meters from the crater, and the large volcanic block reached the 4th station from 1300 meters to 1700 meters from the crater. It seems that magma has accumulated deep under the Aira caldera in the back of Kagoshima Bay, and the amount of volcanic gas released per day is still high.

The Japan Meteorological Agency has called for warnings of large cinders and pyroclastic flows in the area about 2 km from the Minamidake summit crater and the Showa crater, as eruptions may occur mainly in the Minamidake summit crater.

Eruption caution level 2 is 5 volcanoes

The eruption warning level 2 where access to the area around the crater is restricted is as follows: “Mount Shirane” at Mt. Kusatsu Shirane, ▽ “Mount Asama”, ▽ “Mount Aso”, ▽ “Kuchinoerabujima”, ▽ “Suwayuki” It is announced in five volcanoes of “Sejima”.

<Mt. Asama>
At Asama, no eruption occurred since August 26. The amount of volcanic gas released per day is somewhat low, and no crustal movements indicating magma ascent from deep underground have been observed. On the other hand, after September 14, it seems that the number of small earthquakes has increased around the crater and that unstable conditions have continued in the shallow part of the mountain.

The Japan Meteorological Agency is wary of large cinders and pyroclastic flows within a range of about 2 km from the summit crater and calls for not entering dangerous areas according to instructions from local governments, etc., as a small eruption may occur again.

<Mt. Aso>
At Mt. Aso, the eruption continued at the Nakadake No. 1 crater, and ashes were observed around Mt. Aso in the lee area of ​​the crater. The amount of volcanic gas released remained generally high, with repeated increases and decreases. Volcanic activity is increasing as the ground temperature in the crater continues to be high.

The Japan Meteorological Agency is cautious of large cinders and pyroclastic flows within the range of about 1 km from Nakadake No. 1 crater, and calls on not entering dangerous areas according to instructions from local governments.

<Mt. Shirane of Kusatsu Shirane>
At Mt. Shirane in Kusatsu-Shirane, volcanic earthquakes have increased slightly in the shallow part of Yukama since early September, and tilt fluctuations that indicate the expansion of shallow parts of Yukama have been observed. The concentration of components from hot volcanic gas in the water in the kettle continues to be high.

The Japan Meteorological Agency has called for a large volcanic block to be cautious about 1 kilometer from Yugama crater, as small-scale steam eruptions may continue.

<Kuchinoerabujima>
In Kuchinoerabujima, no eruption has been observed since February 3, but the amount of volcanic gas released has continued to be somewhat high.

The Japan Meteorological Agency has called for warnings of large cinders and pyroclastic flows in the range of approximately 1 km from the crater, and pyroclastic flows in the range of approximately 2 km west of the crater.

<Suwanosejima>
In September, an eruption occurred at the Mitake crater in Suwanosejima. The Japan Meteorological Agency is calling for caution against large cinders associated with eruptions in the range of about 1 km from the crater, as there is a risk of eruptions affecting the crater area.

2 volcanoes around the crater

Although no eruption warning level has been introduced, “Nanojima” and “Iwojima” in the Ogasawara Islands have been announced. <Nishinoshima>. In Nishinoshima, the volcanic activity is clearly lower than around July last year when the eruption was confirmed. Although the possibility of eruption is low, fumarole has been confirmed near the crater.

The Japan Meteorological Agency has called for attention to large volcanic blocks in the range of about 500 meters from the crater, as attention needs to be paid to future volcanic activity.

<Iwo Jima>
On Iwo Jima, where it is estimated that a submarine eruption occurred in September of last year, there are fluctuations that indicate the uplift of the ground, and the temperature of the island is generally high.

The Japan Meteorological Agency has called for caution as volcanic activity is somewhat active and there is a risk of an eruption affecting the crater area.

“Eruption warning (surrounding sea area)” in “Fukutokuoka Noba”

At Fukutokuoka Noba, a submarine volcano near the Ogasawara Islands, an eruption warning (surrounding sea area) has been announced as an eruption that may affect the surrounding sea area. In the vicinity, discoloration of the sea surface, which seems to be due to volcanic activity, has been confirmed.

The Japan Meteorological Agency has called for vigilance in the surrounding waters as a small-scale submarine eruption is expected.

Hakone is level 1

At Hakone, the volcanic earthquake that increased in May decreased in September, and the crustal deformation that was considered to indicate the expansion of the mountain was almost stagnant in October. For this reason, the Japan Meteorological Agency said that the possibility of an eruption in the assumed crater area around Owakudani became low. Lowered to 1.

The crater area around Owakudani continues to call attention to sudden eruptions such as volcanic ash.

No alarm / Level 1 risk awareness

There are no volcanic eruption warnings among active volcanoes nationwide, and there are volcanic eruption alerts at level 1. However, this is still an active volcano that has repeatedly erupted in the past.

Check the latest volcano information

You can check the status and precautions of volcanic activity in each region on the Japan Meteorological Agency, local meteorological observatories, and local government websites.

Source: nhk

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