This is 921 earthquake in Taiwan. The sport field in a elementary school is uplift. This picture shows that it is secondary wave. The epicenter is 23.85 degrees north latitude and 120.82 degrees east longitude, about 8.0 kilometers in the town of Jincheng County, Nantong County. Taiwan is located at the junction of the Eurasian Continental Plate and the Philippine Sea Plate, part of the Pacific Fire Ring, with frequent earthquakes. The Philippine Sea plate has been moving northwest since the new generation, and Taiwan’s formation are inextricably linked, but the annual 8.2 km moving speed, also in the eastern part of the East Rift Valley, the central mountains, the western foothills and The plains form a series of faults. These faults are highly active and cause many devastating earthquakes in Taiwan’s history.