Japanese Prediction Of 2025 Earthquake. Japan issued its first “megaquake advisory” last week after a powerful earthquake struck off the southeastern coast of the country’s southern main island of kyushu. By calculating the intervals between each major quake, the japanese government has warned there is a 70% to 80% chance that japan will be rocked by another nankai trough earthquake within 30.

Japanese scientists say the country should prepare for a possible megaquake that could kill hundreds of thousands of people—although they stress the warning does not mean a colossal tremor is imminent. By calculating the intervals between each major quake, the japanese government has warned there is a 70 per cent to 80 per cent chance that japan will be rocked by another nankai trough earthquake within 30 years, expected to be between magnitude 8 and 9.