What is Megaquake and why Japan has issued advisory on it
On August 8, 2024, Southern Japan was struck by a magnitude 7.1 earthquake. In response, the meteorological agency issued a warning for another potential earthquake, with a high risk expected over the coming week. This is the first time Japan has ever issued a 'megaquake' alert. The concern centers on the Nankai Trough, a subduction zone where there is a significant danger of strong shaking and tsunamis, with the potential to produce earthquakes of magnitude 8 or 9.