On March 30, 2025, Japan raised Shinmoedake volcano’s alert to level 3 due to over 200 tremors in 24 hours, indicating heightened volcanic activity. Residents living nearby are advised to stay clear of the area as officials warn of potential eruptions and associated hazards. Historical trends suggest the volcano has a significant history of eruptions, necessitating public vigilance.
On March 30, 2025, Japan elevated the volcanic alert for Shinmoedake volcano to level 3, following the occurrence of over 200 volcanic tremors in a 24-hour timeframe. The Japan Meteorological Agency (JMA) made this decision due to increased seismic activity detected beneath the crater, along with ground deformation suggestive of inflation. Previously, Shinmoedake had been under a level 2 alert since December 2024, which already restricted access to its crater.
The JMA reported that the tremors, sometimes peaking at 10 earthquakes within a single hour, indicated escalating volcanic unrest. Early Sunday, ground deformation indicative of magma accumulation was noted, accompanied by a 10-minute succession of volcanic tremors. Satellite observation corroborated this deformation, which has been ongoing since approximately November of the previous year.
Officials warned of the potential for eruptions that could project materials up to 4 kilometers from the crater, as well as pyroclastic density currents reaching approximately 2 kilometers. Furthermore, volcanic ash and lapilli could be distributed by winds, impacting regions far from the eruption site. Concerns also included the risk of air shock waves causing structural damage in nearby areas.
Residents of Miyakonojo, Kobayashi, Ebino, Takaharu, and Kirishima City have been strongly advised to steer clear of the crater’s vicinity. The last eruption in the Kirishima range occurred on June 27, 2018, with a Volcanic Explosivity Index (VEI) of 3 and no activity since then. Local authorities have reiterated the importance of adhering to safety instructions, especially given the experiences from previous eruptions that led to injuries and property damage.
Kirishimayama, the volcanic group encompassing Shinmoedake, includes a variety of volcanic formations across a 20 x 30 km area. Its historical eruptions have been documented since the 8th century, primarily occurring along a defined east-west line within the region. Citizens are urged to remain vigilant regarding the effects of potential volcanic activity, including ashfall and small rockfalls.
The elevation of the volcanic alert for Shinmoedake to level 3 signifies a serious increase in volcanic activity, marked by a significant number of tremors and observable ground deformation. Citizens in the surrounding areas have been advised to avoid the vicinity to ensure safety from potential eruptions and ash fallout. Historical activity indicates a pattern of eruptions within this volcanic region, underscoring the need for public awareness and adherence to safety measures.
Original Source: watchers.news
