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It has now become a popular destination due to its hot spring resorts.

In this eruptive activity, however, Mt. Furthermore, the number of pyroclastic flows from May 25 to June 2 had increased to 165, and all had stopped near the Sabo dam in the upper reaches of the valley. The main peak is Fugen-dake, but the volcanic activity from 1990 (Heisei 2) to 1995 (Heisei 7) made Heisei Shinzan, which was higher in elevation.

Mayuyama, which previously caused the 1972 disaster. I thought we could escape by car, but I didn't know the extent at which it burned. Mount Unzen is part of Shimabara Peninsula, which has seen extensive volcanism over millions of years. The latest eruption is said to have ended in 1995.The eruption that caused the tsunami was in 1792, not 1972.※当サイトは権利侵害を行わないよう万全を期しておりますが、万が一当サイトの記事や画像に関し被害申告等をなさりたい場合は、以下のメールアドレスからご連絡いただければ幸いです。info@jpninfo.com*We are making every effort to prevent copyright infringement on our website, but please contact us through our email address below in case you would like to report a violation regarding our articles or images.Mount Unzen has been dubbed as the most lethal of all volcanoes in Japan. Magma builds up underground; when there is enough pressure, there is an eruption. According to the “Investigation of Disaster Information Transmission and Residents' Responses during the 1991 Unzendake Eruption” conducted in 1992, 75% of local residents recognized debris flows as more dangerous than pyroclastic flows before June 2. In addition, many visitors had begun to gather around Unzendake to see the plumes. In 200,000 years, the volcano grew rapidly which ultimately formed a large cone. All of the areas surrounding the “fixed point” where many casualties occurred, were within the advised evacuation zone.Similarly, the Japan Broadcasting Corporation (NHK) stopped shooting from within the evacuated area from the end of May and arranged for an unmanned camera in the Kamikoba area. Unzen is a name of a group of strat ovolcanoes that was formed by several overlapping active volcanoes spanning 25 km south to north of the Shimabara peninsula. However, the place is also a popular destination for tourists due to the hot springs on its southwest side.The mountain’s deadliest eruption occurred in 1792 on the night of May 21 which caused an earthquake and tsunami in the area. Mt. The nickname “fixed point” was established. Many misunderstood them to be mere clouds of dust. It resulted in a tremendous tsunami killing 15,000 inhabitants. The oldest volcanic deposits in the region are about 6 million years old, and extensive eruptions occurred over the whole peninsula between 2.5 and 0.5 million years ago.At that time, a graben formed through crustal faulting, and parts of the peninsula dropped to up to 1000 m below sea level. Fugendake and Heisei Shinzan derive magma from the Chitose Caldera. This eruption caused the first large-scale pyroclastic flow, unprecedented at the time, which killed 43 people in the evacuation zone.

Residents were warned not to enter the evacuation advisory area by Shimabara City and the media, but since May, no concrete image was given regarding the danger of pyroclastic flows compared to that of debris flows (which had caused significant damage previously), and most residents did not take the warnings seriously. Among these were French volcanologists Maurice and Katia Krafft, as well as American geologist Harry Glicken. This was attributed to hydrothermal circulation accelerating the cooling of the magma over the nine to ten years since the end of the eruption.The main drill began in 2003, starting from the northern flank of the volcano with a 440 mm (17 in) hole at an angle of 25 degrees from vertical.

On May 26, a construction worker operating a Sabo dam in the upstream area of the Mizunashi River was caught in a pyroclastic flow; he survived but was sent to hospital with burns on his arms. Mount Unzen is actually a group of composite volcanoes, the highest of which is Mount Fugen, at 4,462 feet (1,360 m). Traffic became heavy as a result.Activity from 150,000 years ago to the present has occurred at a number of sites around the volcanic complex, building four main domes at different times: the No-dake (70–150,000 years old), Myōken-dake (25–40,000 years old), Fugen-dake (younger than 25,000 years old) and Mayu-yama (4,000 years old) volcanic peaks.
During hot summers in Japan, it remains cool. In addition, there was concern about the collapse of Mt. also it erupted 2 times now :3Since prehistoric times, Shimabara Peninsula was seen to be an area of extensive volcanism for many years. Drilling reached 1,800 metres (5,900 ft), the original target depth, without reaching the conduit, but in July 2004 at a depth of 1,995 metres (6,545 ft), the conduit was finally reached. In 200,000 years, the volcano grew rapidly which ultimately formed a large cone.
For this reason, there were many residents doing laundry and field work at homes in the zone that had been declared dangerous. It is an active volcano located on the island of Kyushu, near the city of Shimabara, Nagasaki Prefecture.