Tangshan earthquake of 1976

The main shock occurred at 3:42 am. The epicenter was in the southern part of Tangshan City, about 9 miles (15 km) from the earthquake mountain, swaying in all directions (1,100 km). In the latter half of that same day, Jixian had a big aftershock (level 1) of about 70 km (70 miles) from the northeast. Aftershocks caused further injuries and casualties, and prevented already rescuing activities of people trapped under rubble.

Earthquakes occurred in previously unknown faults, located in the Jidong fault zone near the intersection of the system and the Ginzan - Yanshan mountains, now known as the Tangshan fault. The Tangshan fault is a strike slip along the north-northwest direction. The main impact caused 75-mile (120 kilometers) underground rupture extending north-south and south-west southwest of Tangshan; it also caused significant surface defects to appear in the city.

Approximately 3,650 square miles (9,500 square kilometers) of the surrounding area will withstand the intensity of magnitude greater than magnitude VIII (severe) on the modified Mercary scale. In Tangshan City, intensity reached X (extreme value). Vibrations lasting 14 to 16 seconds transform the particularly deep sandy soil in that area into a fluid like mass (liquefaction). Because there are few buildings fixed to the bedrock, the shaking of the earth and its subsequent liquefaction are unstable and the majority of the building collapses throughout the affected area. Tangshan unmanned residential building, high-rise building, other buildings caused by earthquake damage or serious damage of 85% or more

The earthquake affected infrastructure and agriculture as well. Liquefaction, sudden surface fault, damaged road, railway, bridge, dam, well, other infrastructure. It also caused sandstorms, silt wells, irrigation grooves throughout the region. The sand blown from the ground from the wet sand is caused by the weight gain caused by the soil collapse layer to the sand-sand layer beneath it. In the southern part of Tangshan, liquefaction was the most and large floods of sand caused severe damage to crops.

The Tangshan earthquake of 1976 is also called Tangshan earthquake and it is a natural disaster occurred in the Tangshan area of ​​Hebei Province in China at 7.6 am on July 28, 1976. Within a few minutes, there is no longer an industrial city, Tangshan, with about 1 million residents. 85% of the buildings in the city collapsed or became unusable, all services failed and most road bridges and railway bridges collapsed, seriously damaged. At least 242,000 people died so far (some people said it three times), the third (or perhaps second) most deadly earthquake.

The 2004 earthquake and tsunami have become the most fatal natural disasters in the world since the 1976 Tangshan earthquake. The earthquake was the third strongest earthquake since 1900. The most deadly earthquake in history occurred in Shaanxi province of China in 1556, and the estimated death toll was 830,000 people, but the data of this period may not be reliable. Prior to 2004, the tsunami caused by the Kurakjant volcanic eruption in India and the Pacific in 1883 was thought to have caused the death of 36,000 to 120,000 people. It was probably the most deadly tsunami in the area. In 1782, about 40,000 people were murdered by the tsunami (or hurricane) in the South China Sea. The most deadly tsunami before 2004 was the Italian earthquake in Messina in 1908, about 123,000 people died in the earthquake and tsunami.

Tangshan earthquake: On July 28, 1976, near the east coast of the People's Republic of China, the most deadly earthquake in the 20th century occurred. The epicenter is in the southeast of Beijing about 90 miles, in Tangshan City, Hebei Province, its source is 11 kilometers deep in the city. The first tremor was 8.2, followed by a 7.8 aftershock. The magnitude of the 1964 Alaska earthquake was 8.4, which brought far more damage than Tangshan. However, it is difficult to accurately analyze earthquakes due to political isolation in China and strict government information management. Most foreigners are not allowed to enter the country, and non-Chinese sources are mainly anecdotes. The Indian and Pacific sectors are pressing the Asian continent. As the plate in India moves northeast, it drives the Asian continent.