June 24, 2015 Tsunami: Wushan, Chongqing, China

At about 6:25 p.m. on 2015 June 24, a 2.3 × 10^5 m3 landslide occurred on the east bank of the Daning River in Three Gorges Reservoir, Wushan, China.

The final failure of the landslide mass at 6:25 p.m. on June 24th, extended from below the water level at 145 m elevation to the headscarp at 286 m elevation.

The slide rushed into the Daning River at high speed (∼16 m s−1 as recognizable objects entered the water). It generated a giant river tsunami that inundated nearby shorelines in the Daning River bayou and in Wushan County, resulting in the deaths of two people and the destruction of many facilities. Maximum run-up was 6.2 m on the shoreline opposite to the slide site.

Luckily, almost all the people on ships evacuated 1 d before the landslide thanks to visual observations of the small collapse at the toe and the arc fissures at the top on June 23rd. These were reported by part-time monitors from the government's 'geo-hazards measurement and prevention group' projects. However, an 8-yr old boy swimming in the Yangtze River 2 km downstream from the landslide was killed by the hazardous river tsunami. 11 mooring ropes were damaged to different extents from which four people suffered minor wounds, and a woman on the bank was hit by one of the broken steel mooring ropes and died in hospital the next day. A group of fishermen successfully escaped to higher ground when they realized the danger, but their motorbikes were swallowed by waves. Due to the early warning of the hazard, at 9 p.m., June 24, the maritime department closed the Yangtze River and Daning River channel and checked for potentially unstable bank slopes.

(above from reference #12385)