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Japan issues guidelines telling public what to do if Mount Fuji erupts

  • The Japan News reported on March 21, 2025, about Japanese authorities issuing guidelines for the public on how to respond if Mount Fuji erupts, acknowledging it as an active volcano, even though there is no suggestion that an eruption is imminent.
  • Mount Fuji last erupted in 1707, and volcanologists report rising internal pressure in the magma chamber, increasing the chances of eruption each day and potentially affecting the densely populated city of Tokyo, home to around 41 million people.
  • The guidance advises residents to remain indoors, and those in wooden-frame houses to monitor ash accumulation, evacuating if it reaches 30 cm , as Tokyo is expected to be blanketed with 500 million cubic meters of volcanic ash over 15 days, potentially destroying electrical infrastructure.
  • The government warned that a large-scale eruption would produce an estimated 1.7 billion cubic meters of volcanic ash, covering the sky in black volcanic ash, plunging urban areas into darkness, even during the day, and that the economic loss from a Mount Fuji eruption is estimated to be up to ¥2.5 trillion .
  • Professor Toshitsugu Fujii from the University of Tokyo emphasized the importance of maintaining sufficient stockpiles on a regular basis, as the ashfall could affect a broad area, including the capital region, disrupting logistics and potentially causing power outages, highlighting that more than 30 centimeters of volcanic ash accumulating can cause issues and potentially collapse wooden houses.
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Japan issues guidelines telling public what to do if Mount Fuji erupts

Japanese authorities have issued guidance on how the public should respond if the famous Mount Fuji volcano, near Tokyo, were to erupt.

·Atlanta, United States
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Fodors Travel Guide broke the news in on Wednesday, March 26, 2025.
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