Overview of volcanoes nationwide (September) "Crater area warning" for 9 volcanoes nationwide October 8 22:17
On the 8th, the Japan Meteorological Agency announced the activity status of active volcanoes nationwide and points to be wary of in September.
"Crater area warning" has been announced for 9 volcanoes nationwide, and "eruption warning (peripheral sea area)" has been announced for one submarine volcano because eruptions are occurring and volcanic activity is increasing.
9 volcanoes around the crater
"Mt.
Shirane" of
Mt.
Kusatsu-Shirane in Gunma Prefecture
has been announced as "Crater area warning" because future eruptions may affect the area around the crater and the area where you live.
"Mt. Asama" on the prefectural border of Gunma Prefecture
▽ "Shinmoedake" of the Kirishima mountain range on the prefectural border between Kagoshima and Miyazaki
▽ "Sakurajima" "Kuchinoerabu Island" "Satsuma Ioshima" "Suwanosejima"
▽ Ogasawara There are 9 volcanoes in total, including "Nishinojima" and "Kirishima" in the islands.
Eruption alert level 3 is 2 volcanoes
Of these, eruption alert level 3, which indicates "mountain entry restrictions", which may affect the vicinity of the place of residence, has been announced on "Sakurajima" and "Kuchinoerabujima".
<Sakurajima>
Eruptions have been observed seven times at the Minamidake summit crater on Sakurajima, and very small eruptions have been frequently observed, and eruptive activity continues.
Since September 9, high-sensitivity surveillance cameras have confirmed the "fire phenomenon" in which high-temperature gas is reflected in plumes and clouds at night and appears red.
Since the magma supplied for a long period of time has accumulated in the basement of the Aira Caldera in Kagoshima Bay and the amount of volcanic gas released continues to be rather high, eruptive activity will continue centering on the Minamidake summit crater. It is said that it may be activated.
The Japan Meteorological Agency calls for caution against large fountains and pyroclastic flows within a range of approximately 2 km from the Minamidake summit crater and Showa crater.
<Kuchinoerabu Island>
No eruptions have been observed on Kuchinoerabu Island since August 30th.
Volcanic earthquakes are increasing and decreasing repeatedly, but there are many.
It occurred 249 times on September 1st and 312 times on 19th, and the total for one month was 1920 times, which was much higher than 1032 times in August.
In addition, the amount of magma accumulated underground is comparable to the state before the explosive eruption in 2015, when all residents temporarily evacuated to the outside of the island, based on the observation results of crustal movements.
For this reason, the Japan Meteorological Agency said that it is possible that the volcanic activity would develop to be comparable to that of five years ago. Up to the coast, we are calling for caution against pyroclastic flows.
Eruption alert level 2 is 5 volcanoes
Eruption alert level 2 where access to the crater area is restricted is
▽ "Mt.
Shirane" of
Mt.
Kusatsu-Shirane
▽ "Mt. Asama"
▽ "Shinmoedake" of the Kirishima mountain range
▽ "Satsuma
Iojima
"
▽ "Suwanosejima" It has been announced to the volcano.
<
Mt.
Asama> At
Mt. Asama, the slope fluctuation, which is thought to indicate the bulge on the west side of the mountain, has been almost stagnant since mid-August.
However, volcanic earthquakes continue to occur, increasing and decreasing, and the amount of volcanic plume continues to increase compared to before June, when the eruption alert level was raised.
The Japan Meteorological Agency has called for caution against large volcanic blocks and pyroclastic flows within a range of approximately 2 km from the crater, saying that volcanic activity is increasing and small eruptions may occur in the future.
<Shinmoedake>
Volcanic earthquakes are increasing and decreasing at Shinmoedake in the Kirishima mountain range.
In addition, volcanic activity has increased slightly, with the amount of volcanic gas released continuing to increase.
The Japan Meteorological Agency is calling for caution against large pyroclastic flows within a range of approximately 2 km from the crater and pyroclastic flows within a range of approximately 1 km.
<Satsuma Iojima> A
very small eruption occurred on October 6th at Satsuma Iojima.
There are no particular changes in volcanic earthquakes or crustal movements, but thermal activity has continued to increase over the long term, with "fire projection" observed at night and incombustibility sometimes increasing.
The Japan Meteorological Agency is calling for caution against large fountains within a range of approximately 1 km from the crater.
<Suwanosejima>
Active eruptive activity continues at the Mitake crater on Suwanosejima.
The Japan Meteorological Agency has called for caution against large volcanic blocks within a range of approximately 1 km from the crater, saying that there is a risk of eruptions affecting the area around the crater.
<Mt. Shirane of Mt.
Kusatsu-
Shirane> At Mt.
Kusatsu-Shirane, "Mt. Shirane", volcanic earthquakes have increased in the shallow area near Yugama since early September 2019, and have continued to occur thereafter.
For this reason, hydrothermal activity continues to be rather high, and small-scale steam eruptions may continue to occur.
The Japan Meteorological Agency is calling for caution against large fountains within a range of approximately 1 km from the Yugama crater.
2 volcanoes with no level warning
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>
According to the observation from the sky conducted by the Japan Coast Guard on the 5th, although no eruption was confirmed, it was confirmed that a white plume was rising from the crater.
On the other hand, meteorological satellite observations show almost no increase in the temperature of the ground surface, and the Japan Meteorological Agency says that volcanic activity is declining.
However, as the eruption may continue in the future, we continue to warn around the crater indicating "danger of entering the mountain" and call for caution against large volcanic blocks and lava flows within a range of approximately 2.5 km from the summit crater.
<Iwo Jima>
On Iwo Jima, which is estimated to have had a submarine eruption in September 2018, volcanic activity has remained somewhat active, with fluctuations indicating uplift of the ground and a rise in the ground temperature of the entire island. doing.
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 "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.
The surrounding area is somewhat active, with discoloration of the sea surface, which is thought to be due to volcanic activity, being confirmed.
The Japan Meteorological Agency is calling for caution in the surrounding waters, saying that a small submarine eruption is expected.
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 is changing even at level 1, such as the first fire projection since 2000 on June 7.
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, the meteorological stations in each area, and the websites of local governments.