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Some scientists have tried to use foreshocks to help predict upcoming earthquakes, having one of their few successes with the 1975 Haicheng earthquake in China.
An increase in seismic activity in an area has been used as a method of predicting earthquakes, most notably in the case of the 1975 Haicheng earthquake in China, where an evacuation was triggered by an increase in activity.
He was an ardent opposer of Panayotis Varotsos and the VAN method for earthquake prediction, which he called "the greatest science joke of the century".