An earthquake struck northern Nagano Prefecture on April 18, 2025, at 23:39, shaking the region with a maximum seismic intensity of 5 lower. The Japan Meteorological Agency (JMA) confirmed that the earthquake had a magnitude of 4.4 and occurred at a depth of 10 kilometers. Fortunately, there is no concern regarding a tsunami following this seismic event.
The tremors were felt across various areas, with seismic intensity recorded at 4 in cities and villages including Omachi, Matsukawa, and Ogawa. Other locations, such as Nagano City, Matsumoto City, Ikusaka Village, and Chikuhoku Village, experienced a seismic intensity of 3. Tremors of intensity 2 and 1 were also reported in parts of Niigata, Gunma, and Yamanashi Prefectures.
In the immediate aftermath, the JMA announced the details of the earthquake at 23:43, advising residents to remain vigilant as aftershocks could follow. Notably, an earlier earthquake had already rattled the region at around 20:00 the same evening, with a magnitude of 5.1, which had also registered a maximum seismic intensity of 5 lower.
Reports from the affected areas indicated some structural damage, particularly in the mountainous regions near the epicenter. Collapsed stone walls and fallen roof tiles were noted, raising concerns about safety in those communities. Residents expressed their fears and frustrations, with some stating, “It was a terrifying experience; I just wanted to get home quickly.” The local train services were suspended, leading to crowded stations as people waited for taxis.
As authorities continue to assess the damage, the JMA has issued warnings that residents should remain cautious for the next week, as there is a possibility of additional tremors, potentially stronger than those already experienced. The agency emphasized the importance of preparedness in case of future seismic activity.
The earthquake on April 18 is part of a series of seismic events that have affected the region recently. The JMA has been closely monitoring seismic activity in northern Nagano Prefecture, where geological conditions make it prone to earthquakes. The public is urged to stay informed and prepared for any further developments.
In light of the recent seismic activity, local government officials have begun discussions about enhancing earthquake preparedness measures. This includes reviewing building codes and improving emergency response protocols to ensure the safety of residents in the event of future earthquakes.
As the community begins to recover from the recent quake, the focus remains on ensuring safety and stability. Residents are encouraged to check on their neighbors and assist those who may be more vulnerable during this time of uncertainty. The sense of community support is evident, as many have come together to help each other in the aftermath of the tremors.
Overall, while the earthquake on April 18 was significant, the lack of serious injuries or fatalities is a relief to both residents and officials. The emphasis now is on recovery and preparedness, as the region braces for the possibility of aftershocks in the coming days.
