Does Japan's megaquake warning mean the 'big one' is coming?

Following a recent magnitude 7.5 earthquake in northeastern Japan, authorities have reiterated warnings about a potential megaquake. Japan's earthquake investigation panel estimates a 60-90% chance of a megaquake occurring in the Nankai Trough, a seismically active zone along Japan's Pacific coast, within the next 30 years. Officials are urging residents in seven prefectures to remain vigilant and prepare for a possible magnitude 8 or higher earthquake. While not issuing an evacuation order, they advise checking evacuation routes, securing furniture, and preparing emergency kits. The Nankai Trough has historically been the site of devastating earthquakes, and authorities predict a future megaquake could cause significant casualties and economic damage.

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