January 23, 1556 – Shaanxi province earthquake in China kills estimated 830,000 people, deadliest earthquake in history

Shaanxi earthquake
Shaanxi earthquake

The 1556 Shaanxi earthquake is the deadliest earthquake in recorded history. According to imperial records, approximately 830,000 people lost their lives.

It occurred on the morning of 23 January 1556 in Shaanxi, during the Ming dynasty. More than 97 counties in the provinces of Shaanxi, Shanxi, Henan, Gansu, Hebei, Shandong, Hubei, Hunan, Jiangsu and Anhui were affected. Buildings were damaged slightly in the cities of Beijing, Chengdu and Shanghai. An 840-kilometre-wide (520 mi) area was destroyed, and in some counties as much as 60% of the population was killed. Most of the population in the area at the time lived in yaodongs, artificial caves in loess cliffs; these collapsed in great numbers, causing many casualties.

Geography

The Shaanxi earthquake’s epicenter was in the Wei River Valley in Shaanxi Province, near Huaxian (now Huazhou District of Weinan), Weinan and Huayin. In Huaxian, every single building and home was demolished, killing more than half the residents of the city, with a death toll estimated in the hundreds of thousands. The situation in Weinan and Huayin was similar.

In certain areas, 20-metre-deep (66 ft) crevices opened in the earth. Destruction and death were everywhere, affecting places as far as 500 kilometres (310 mi) from the epicenter. The earthquake also triggered landslides, which contributed to the massive death toll. The rupture occurred during the reign of the Jiajing Emperor of the Ming dynasty. Therefore, in the Chinese historical record, this earthquake is often referred to as the Jiajing Great earthquake.

Modern estimates, based on geological data, give the earthquake a magnitude of approximately 8 Mw on the moment magnitude scale and XI (catastrophic damage) on the Mercalli scale, though more recent discoveries have shown that it was more likely 7.9 Mw. While it was the deadliest earthquake and the third-deadliest natural disaster in history, there have been earthquakes with considerably higher magnitudes. Following the earthquake, aftershocks continued several times a month for half a year.

In the annals of China it was described in this manner:

In the winter of 1556, an earthquake catastrophe occurred in the Shaanxi and Shanxi Provinces. In our Hua County, various misfortunes took place. Mountains and rivers changed places and roads were destroyed. In some places, the ground suddenly rose up and formed new hills, or it sank abruptly and became new valleys. In other areas, a stream burst out in an instant, or the ground broke and new gullies appeared. Huts, official houses, temples and city walls collapsed all of a sudden.

The earthquake damaged many of the Forest of Stone steles badly. Of the 114 Kaicheng Stone Classics, 40 were broken in the earthquake.

The scholar Qin Keda lived through the earthquake and recorded details. One conclusion he drew was that “at the very beginning of an earthquake, people indoors should not go out immediately. Just crouch down and wait. Even if the nest has collapsed, some eggs may remain intact.” The shaking reduced the height of the Small Wild Goose Pagoda in Xi’an by three levels.

Loess caves

Millions of people at the time lived in artificial loess caves on high cliffs in the area of the Loess Plateau. Loess is the silty soil that windstorms have deposited on the plateau over the ages. The soft loess clay formed over thousands of years due to wind blowing silt into the area from the Gobi Desert. Loess is a highly erosion-prone soil that is susceptible to the forces of wind and water.

The Loess Plateau and its dusty soil cover almost all of Shanxi, Shaanxi, and Gansu provinces and parts of others. Much of the population lived in dwellings called yaodongs in these cliffs. This was the major contributing factor to the very high death toll. The earthquake collapsed many caves and caused landslides, which destroyed many more.

Cost

The cost of damage done by the earthquake is almost impossible to measure in modern terms. The death toll, however, has been traditionally given as 820,000 to 830,000. The accompanying property damage would have been incalculable—an entire region of inner China had been destroyed and an estimated 60% of the region’s population died.

Foreign reaction

The Portuguese Dominican friar Gaspar da Cruz, who visited Guangzhou later in 1556, heard about the earthquake, and later reported about it in the last chapter of his book A Treatise of China (1569). He viewed the earthquake as a possible punishment for people’s sins, and the Great Comet of 1556 as, possibly, the sign of this calamity (as well as perhaps the sign of the birth of the Antichrist).

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Categories: History

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