1960 Chilean earthquake and tsunami. Animation of a global map centred on the Pacific, showing the tsunami waves that resulted from the Chilean earthquake of 22 May 1960. This was the largest earthquake ever recorded, and had a moment magnitude of 9.5. It generated a tsunami that affected every ocean on Earth. Chile suffered the greatest impact, with tsunami waves reaching as high as 25 metres. The tsunami waves also affected Japan, Hawaii and the Philippines. Tsunami waves were many metres high all around the Pacific coastlines. A global tsunami warning system did not exist in 1960. As a result of this tsunami the United Nations would set up the Pacific Tsunami Warning System (PTWS) in 1965 with the Honolulu Observatory as its headquarters. The animation covers 48 hours, with coloured dots showing where the waves hit land (red dots are the highest waves, key at lower left). At the end of the animation, the tsunami's 'energy map' is shown, indicating the uneven distribution of the kinetic energy produced by the earthquake and tsunami.