Recent quakes in a city less than 100 miles from Beijing are likely the aftershocks of the catastrophic earthquake that destroyed the city 36 years ago, new research finds.

As evidence that the recent quakes are aftershocks, the researchers noted that seismic activity in the Tangshan region since its 1976 quake has remained higher than is normal for the plain. This seismic activity also has been subsiding in a manner typically seen with aftershocks, albeit in a more drawn-out way, said researcher Mian Liu, a geophysicist at the University of Missouri.

[link to news.yahoo.com]