Cities that the Tancheng earthquake zone passes through

The Tancheng earthquake zone passes through Anqiu City, Linyi City, Jining City and other places.

In 1668, an 8.5-magnitude earthquake occurred in Tancheng, which was the highest-magnitude earthquake that occurred in the seismic zone. In 1956, a 7.3-magnitude earthquake occurred, causing a lot of losses to people and property. The existence of this fault zone has also brought many mineral resources to Shandong Province that are closely related to our daily lives, such as gold mines, oil, natural gas, gemstones and other resources.

The Tancheng earthquake zone involves Anqiu City, Linyi City, Jining City and other places in Shandong. In the early years, every family in Linyi lived in earthquake-proof beds. Seismic zones refer to areas where earthquakes are concentrated and appear in regular strips. Within the Shandong seismic zone, the Tanlu Fault Zone is a large-scale and complex fault zone that extends for more than 2,400 kilometers and passes through different geotectonic units in eastern China.

Causes of the formation of seismic zones

The formation of seismic zones is mainly affected by neotectonic movement. Neotectonic movement is a type of tectonic movement divided according to the time of occurrence. Tectonic movement is caused by the internal force of the earth. The effect of deformation and displacement of the earth's crust and lithosphere is also called crustal movement or tectonic action. The energy of tectonic movement mainly comes from the interior of the earth, which is the cause of geological processes and one of the basis for dividing geological time.

The main manifestations of neotectonic movement are volcanoes, earthquakes, faults, folds, hot springs and geothermal anomalies. Among them, earthquakes are the most obvious manifestation of modern tectonic activity. They are related to the horizontal displacement or vertical displacement of the active fault system. Displacement is closely related. According to fault division, seismic fault zones can be divided into four types: geometric segmentation, structural segmentation, rupture segmentation and activity segmentation based on the geometric shape and structural characteristics of the fault.