When and where did the only earthquake that has ever been predicted by foreshock occur?

The only earthquake that has ever been successfully predicted by foreshocks occurred on October 4, 1981, in the city of Haicheng, China. Scientists observed a series of foreshocks leading up to the main earthquake, which registered a magnitude of 7.3. This prediction allowed for the evacuation of residents, significantly reducing casualties. The event remains a significant case in the study of earthquake prediction.