2008 Sichuan Earthquake: The Wenchuan Disaster in Western China

The 2008 Sichuan earthquake, known in China as the Wenchuan earthquake, struck western China on the afternoon of 12 May 2008. With a magnitude of 7.9, it killed about 69,000 people, left nearly 18,000 missing and destroyed millions of homes in the mountains of Sichuan Province. It was China’s deadliest earthquake since 1976, and the collapse of many schools made it one of the most painful disasters in the country’s modern history.

Background: the Longmenshan fault

Sichuan lies at the edge of the Tibetan Plateau, where the high, slowly spreading crust of Tibet presses against the stable Sichuan Basin to the east. The boundary is marked by the Longmenshan (“Dragon’s Gate Mountains”) fault zone, a series of thrust faults running from south-west to north-east.

Large earthquakes on this fault zone were thought to be rare, and it had not produced an event of this size in recorded history. Because the fault moved slowly, measured in millimetres per year, many hazard maps had underestimated the danger. Many towns in the region lay in narrow river valleys surrounded by steep slopes, which made them especially vulnerable to landslides.

The mountains west of the Sichuan Basin are home to Han Chinese as well as Qiang and Tibetan communities. Many rural houses were built of brick or stone without reinforcement, and rapid growth in the previous decades had produced many public buildings of uneven quality. The famous Dujiangyan irrigation system, built more than 2,000 years earlier, lay close to the area that would be most severely shaken.

What happened on 12 May 2008

The earthquake struck at 14:28 local time on Monday 12 May. Its epicentre lay in Wenchuan County, about 80 kilometres north-west of Sichuan’s capital, Chengdu. The rupture spread north-eastwards along the Longmenshan fault for roughly 240 kilometres and lasted around two minutes, with parts of the ground lifted by several metres.

Shaking was felt as far away as Beijing, Shanghai, Bangkok and Taipei. The hardest-hit places included Yingxiu town near the epicentre, Beichuan county town, Dujiangyan, Mianzhu, Shifang and Qingchuan. In Beichuan, a large part of the town was destroyed by shaking and by landslides that crashed down from the hillsides.

Tens of thousands of landslides and rockfalls followed. Some blocked rivers and created “quake lakes”. The largest, at Tangjiashan above Beichuan, threatened to burst and flood towns downstream; engineers and soldiers dug a spillway, and the lake was drained in a controlled way in June 2008 after more than 200,000 people had been evacuated.

Victims and damage

According to official Chinese figures, 69,227 people were confirmed dead, 17,923 were missing and 374,643 were injured. Most of those who died were in Sichuan, but deaths were also recorded in neighbouring Gansu and Shaanxi provinces.

Around 5 million people were left homeless, and millions of buildings were destroyed or damaged. Strong aftershocks continued for months, some above magnitude 6, bringing down weakened buildings and setting off further landslides that hampered rescuers.

The earthquake also affected wildlife and heritage. The Wolong panda reserve, close to the epicentre, was badly damaged, and some of its giant pandas were moved to other centres. Old temples and towns in the mountains suffered heavy damage, though the ancient Dujiangyan irrigation works largely survived. Roads, bridges, power lines and telecommunications were cut, isolating mountain communities for days. Direct economic losses were officially estimated at about 845 billion yuan (more than 120 billion US dollars at the time), making it one of the most costly natural disasters in China’s history.

The collapsed schools

The earthquake struck during school hours. Many school buildings collapsed completely, sometimes while nearby government offices and other buildings remained standing. In places such as Juyuan in Dujiangyan, Hanwang in Mianzhu and Beichuan, hundreds of pupils were killed in single schools.

The Chinese government later stated that 5,335 students were dead or missing. Grieving parents and critics argued that poor construction, sometimes linked to corruption, had made the schools unsafe, and they used the term “tofu-dreg schools” (doufuzha) for buildings made of weak materials. Some parents staged protests and sought investigations.

The issue became politically sensitive. Authorities offered compensation to many families but discouraged public protest, and several activists who collected the names of dead children or campaigned on the issue were detained or prosecuted. The debate over school safety influenced later national rules requiring stronger school buildings.

Rescue and relief

The response was among the largest in China’s history. Premier Wen Jiabao flew to the disaster area within hours, and his visits to rescue sites were widely broadcast. President Hu Jintao also visited the region. More than 100,000 soldiers and armed police were deployed, together with firefighters, medical teams and large numbers of volunteers from across China.

Unusually for China at the time, domestic media reported the disaster openly in its early days, and foreign journalists were allowed broad access. China also accepted foreign rescue teams, including teams from Japan, Russia, South Korea, Singapore and Taiwan, and received relief supplies from many countries.

Donations from Chinese citizens and companies reached unprecedented levels, and the earthquake is often seen as a turning point for volunteering and civil society in China. On 19 May the country began three days of national mourning, marked by a silence at 14:28, the time the earthquake struck. The Olympic torch relay, then travelling through China ahead of the Beijing Games, was suspended for those days.

Reconstruction

The government launched a three-year reconstruction plan worth about 1 trillion yuan. Under a “pairing assistance” system, wealthier provinces and cities in eastern China were each assigned a stricken county and funded and organised its rebuilding.

New towns, schools and hospitals were built rapidly, many to stronger seismic standards. Beichuan’s old town was abandoned and preserved as an earthquake memorial, and a new county town was built about 20 kilometres away at Yongchang. Yingxiu was rebuilt and also includes a memorial site. The authorities declared the main tasks of reconstruction largely complete by around 2011–2012.

The reconstruction was praised for its speed but also criticised. Some new towns were built in places that remained exposed to landslides and floods, and some relocated villagers struggled to find work in their new homes. Debris flows triggered by heavy rain in later years damaged parts of the rebuilt area.

Scientists drew important lessons from the disaster about the hazard of thrust faults beneath mountain fronts and the danger of earthquake-triggered landslides. Later earthquakes in the same region, such as the Lushan earthquake of 2013, tested the improved building standards.

Timeline

• 2008, 12 May, 14:28: A magnitude 7.9 earthquake strikes Wenchuan County, Sichuan.
• 2008, 12 May, evening: Premier Wen Jiabao arrives in the disaster area.
• 2008, 19–21 May: China observes three days of national mourning; the Olympic torch relay is suspended.
• 2008, May–June: Soldiers and engineers dig a spillway for the Tangjiashan quake lake.
• 2008, 7–10 June: Water begins flowing through the Tangjiashan spillway, and the lake is largely drained within days.
• 2008, September: The national reconstruction plan is approved.
• 2011–2012: The authorities declare the main reconstruction tasks largely complete.

Why it matters

The Sichuan earthquake was China’s deadliest disaster in a generation and showed both the strength of its state-led emergency response and the human cost of unsafe buildings. Compared with the Tangshan earthquake of 1976 and the historic Shaanxi earthquake of 1556, it unfolded in full view of modern media, and the questions it raised about school construction and accountability still resonate in China today.