1960 On May 22nd, the largest earthquake occurred in Chile, South America. There are many earthquake disasters here because: it is located in the collision zone between the Antarctic plate and the American plate, with active crustal movement and many volcanic earthquakes; It belongs to the Pacific Rim volcanic seismic belt.

2 1, 1, In May 1960, a series of major earthquakes occurred in the coastal areas of central and southern Chile. The most prominent event in the plate boundary earthquake in the 20th century. From Concepcion in the north to valdivia in the south, seven earthquakes of magnitude 7 or above occurred in one month, three of which were huge earthquakes of magnitude 7.7 or above, and the largest one was magnitude 8.9. Due to the saturation effect of surface wave magnitude MS, 8.9 cannot represent the magnitude of earthquake. If calculated according to the moment magnitude MW, the earthquake should be 9.5 (see magnitude). This is because the rupture surface of the giant earthquake at the plate boundary is very large, which exceeds the range indicated by the magnitude of surface wave.

Due to the huge scale of the earthquake, the whole earth was hit by the capital Santiago, which caused the earth to oscillate freely, and the coastal towns from Santiago to puerto montt were destroyed, causing more than 5,700 deaths. In addition, tsunamis caused by earthquakes are rare. 15 hours later, a huge wave as high as 15 meters hit the Hawaiian islands. Twenty-three hours later, a 6-meter-high wave hit the harbor and wharf in Japan and overturned a house. The tsunami killed 800 people in Japan and left 654.38+500,000 homeless. Accompanied by violent volcanic eruptions.