Japan issues alert for possible megathrust earthquake after 7.1 magnitude quake.

The Japan Meteorological Agency issued an unprecedented precautionary alert on Thursday, indicating the possibility of a megathrust earthquake in the Nankai Trough, located south of Honshu Island. This warning comes just hours after a magnitude 7.1 quake shook the coasts of Kyushu Island, which also led to the issuance of a tsunami alert in several nearby prefectures. This is the first time the national agency has taken such a measure, reflecting growing concerns about seismic activity in the region. Authorities have indicated that the likelihood of a major earthquake in the Nankai Trough is now higher than usual, fueling fears in a nation that has faced devastating natural disasters in the past. The alert will remain in effect for a week, although officials are warning the public to stay vigilant even if the situation appears to calm down. Such warnings are issued when abnormal phenomena are detected in the Nankai Trough or when the possibility of a significant earthquake is deemed to have increased, according to the Cabinet Office. Experts have noted that a potential megathrust earthquake could not only affect areas close to the recent tremor but could also extend across the entire Nankai Trough. Historically, major earthquakes have occurred in this region every 100 to 150 years, meaning time is running out for the occurrence of another significant event. Scientists warn that if an earthquake occurs in the Nankai Trough, it could encompass an area extending from Kyushu Island to the prefectures of Osaka and Aichi, and even stretch eastward, reaching regions closer to Tokyo. It is estimated that such a seismic event could reach magnitudes of up to 9, which would have devastating consequences. An apocalyptic scenario of this magnitude would not only be catastrophic in terms of human losses—estimated at up to 320,000 deaths—but it would also cause trillion-dollar economic damages to the country. The last time Japan experienced a disaster of such scale was over 70 years ago, raising concerns among scientists about the imminent possibility of a similar event occurring. The epicenter of Thursday's earthquake was located 29 kilometers east of the city of Miyazaki, at a depth of 33 kilometers. The seismic sequence was accompanied by a tremor of magnitude 7.1 near Nichinan, which has intensified fear among the population. Social media has been flooded with images showing citizens trying to find safety in shopping malls, restaurants, and offices as tremors continue. The images depict lamps and other objects swaying, reflecting the magnitude of the shaking that has rattled the country. As a precautionary measure, the Japan Meteorological Agency also issued a tsunami warning for several prefectures, including Miyazaki, Ehime, and Kochi. Waves in these coastal areas are estimated to potentially reach a height of one meter, which, while not devastating, adds an extra layer of anxiety to an already critical situation. In this context, it is essential for citizens to follow the authorities' recommendations and stay informed about the latest updates regarding seismic activity. Japan's history has shown that preparation and prompt response are crucial to minimizing the impact of these natural phenomena, and the nation finds itself once again at a critical moment in its struggle against nature.