28 March 1965

An Mw? 7.4 earthquake in Chile sets off a series of tailings dam failures, burying the town of El Cobre and killing at least 500 people.

The earthquake that occurred in Chile in 1965 is known as the Great Chilean earthquake or the Valdivia earthquake. It was the most powerful earthquake ever recorded, with a magnitude of 9.5 on the Richter scale, and it caused widespread damage throughout the country.