An M6.6 earthquake struck near Ya'an City in Sichuan Province, China on April 20, 2013, killing at least 180 people and injuring about 11,000. The shallow quake was generated by the same fault that caused the devastating 2008 Sichuan earthquake. It destroyed buildings and triggered landslides, hampering rescue efforts. Many buildings collapsed as they were unable to withstand the strong shaking. Rain and debris on April 21 further slowed rescue work during the critical first 48 hours.