Wenchuan earthquake (2008)
A magnitude 7.9 earthquake struck mountainous Wenchuan County in Sichuan on May 12, 2008, killing nearly 90,000 people and destroying entire towns. It was China's deadliest earthquake in decades.
The government launched a massive rescue and multi-year rebuilding effort.
Wenchuan led to stricter building codes across China and made Sichuan's seismic risk a permanent national priority.
That history explains why a moderate Sichuan quake draws international alerts and immediate official scrutiny.
