After a magnitude 7.5 earthquake struck north-eastern Japan on Monday, authorities again warned of the possibility of a future megaquake. It means that thoughts in Japan are turning to the 'big one' - a once-in-a-century quake.
In September, Japan's earthquake investigation panel indicated a 60-90% chance that a megaquake would occur in the Nankai Trough - an area of seismic activity along the Pacific coast - within the next 30 years. Previous warnings had suggested that such an event could trigger a tsunami over 20 meters high, potentially endangering hundreds of thousands of lives and causing trillions in economic damage.
Officials have urged residents in several prefectures to stay alert as they assess potential risks following the recent tremors. They are advised to check evacuation routes, secure belongings, and prepare emergency kits. However, no immediate evacuation orders have been issued.
The recent tremor is prompting discussions about the 'big one', which refers to a major earthquake that could devastate densely populated regions. Japan's history with earthquakes underscores the severity of potential threats, particularly in regions like the Nankai Trough.
Despite the warnings, experts emphasize that while the likelihood of a major earthquake is heightened, it is not certain that one will occur in the near future. The Japan Meteorological Agency has indicated that the possibility is about one in 100, making it crucial for residents to stay prepared but also not to panic.
