Japan has urgently raised the volcanic alert level for Mt. Shinmoedake to Level 3, banning visitors from approaching the area. The warning comes after a sharp rise in earthquakes and signs of the mountain swelling, sparking fears of an imminent eruption.
Located in Kagoshima Prefecture on Kyushu Island, Mt. Shinmoedake is part of the Kirishima mountain range. The last time authorities issued a Level 3 alert was in 2018, when the volcano last erupted. Scientists have detected increasing volcanic tremors since late March, prompting immediate action.
Officials have barred entry within 2.5 miles (4 km) of the crater due to the risk of flying rocks and sudden explosions. The Disaster Management Agency has warned people to stay away and follow local guidance. While no evacuations have been ordered yet, authorities are ready to act if conditions worsen.
Tomoyuki Kanno, a senior volcano expert, warned that ash and debris could spread beyond the danger zone, urging nearby residents to stay alert.
Japan is also developing a volcanic ash alert system to prepare for future eruptions. Ashfall can disrupt travel, damage buildings, and harm health. Even small amounts can cause flight cancellations and road closures, while heavy buildup can collapse roofs.
The new system will issue advisories for ashfall over 1 millimeter and warnings for deposits exceeding 3 centimeters. In extreme cases, alerts will be sent if 30 centimeters or more is expected. The program is set to launch within a few years.
Mt. Shinmoedake’s unrest highlights Japan’s constant volcanic risks. With 110 active volcanoes, the country remains vigilant. Travelers should check updates and avoid restricted zones during alerts. Scientists continue monitoring for further changes.
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