Japan issues first megaquake advisory, raising public concern

Japan issued its first-ever "megaquake advisory" following a magnitude 7.1 earthquake off Kyushu on August 8. The Japan Meteorological Agency estimates a 70-80% chance of a magnitude 8 or 9 quake in the next 30 years, raising public concern. The advisory has led to widespread confusion, cancellations of events, and increased demand for emergency supplies, despite no abnormal seismic activity detected.