The Japan Meteorological Agency has warned ships sailing in the vicinity of the Bayonnaise Rocks, a submarine volcano in the Izu Islands where the color of the sea water was confirmed to change late last month. I'm here.
The Japan Meteorological Agency announced the activity status of active volcanoes nationwide last month and points to be wary of.
Japan Meteorological Agency Alerts ships navigating nearby waters
Among them, on the 26th of last month, it was confirmed that the color of the seawater changed over a diameter of 100 meters near the "Bayonnaise Rocks", a submarine volcano located about 65 kilometers south-southeast of Aogashima in the Izu Islands.
The discoloration of sea water has been since November 2017, and the Japan Meteorological Agency has issued an eruption warning that there is a possibility that a submarine eruption may occur in the future.
Since the 27th of last month, there have been no observations by aircraft, and observations by meteorological satellites have not confirmed an eruption.
The Japan Meteorological Agency continues to warn ships navigating the nearby sea area, saying that large volcanic blocks and volcanic gas and volcanic ash spreading at high speed called "base surge" may occur during an eruption. I want you to be careful about floating objects.
"Kaitoku Seamount" in the Ogasawara Islands Continues to confirm discolored water
In addition, it has been confirmed that the color of the sea water has changed since August last year near the submarine volcano Kaitoku Seamount, which is located north of Iwo Jima in the Ogasawara Islands. Confirmed.
Active volcanic activity continues, and there is a possibility of an undersea eruption. I want it
Sakurajima Showa crater erupts for the first time in five years
At Sakurajima in Kagoshima Prefecture, an eruption occurred at the Showa crater before 11:00 am on the 8th, and a volcanic plume rose from the crater to a height of 800 meters.
It was a very small eruption, and it was the first time in about five years since April 2018 that the Showa crater had erupted.
Before and after this eruption, no significant crustal movement was confirmed, but since around the 14th of last month, there has been a gradual change indicating expansion of the mountain body, and this eruption has not resolved it.
The Japan Meteorological Agency maintains the volcanic alert level 3, and calls for caution against large volcanic blocks and pyroclastic flows within a range of about 2 km from the Showa crater and the Minamidake summit crater.
Masamichi Nakamura, a volcanic activity evaluation analyst from the Japan Meteorological Agency's Volcanic Observation Division, said, ``The Showa crater has a tendency to repeat eruptions that throw volcanic blocks like the Minamidake summit crater, and there have been eruptions that have accompanied pyroclastic flows. If that happens, there is a possibility of such an eruption, so I would like to continue to monitor it."