1975 Haicheng earthquake

The 1975 Haicheng earthquake measuring 7.3 on the Richter Scale occurred at 19:36 on February 4, 1975 in Haicheng, Liaoning, China, a city that at the time had approximately 1 million residents.

Seismologists sent out warnings about this earthquake a day earlier and ordered evacuations. Because of this correct prediction, many lives were saved. This was the first successful earthquake prediction in history. In the days leading up to the earthquake cats and other animals were thought to have acted strangely, some claim this aided in the prediction of the earthquake. There are some questions as to the vailidity and accuracy of these reports as "It was the sequence that gave the solid prediction."