This paper details the efforts of the Chilean Navy in warning of the tidal waves that followed the earthquakes of May 1960 and the efforts made to collect information concerning the tsunami. Details of time of arrival, damages, wave height and run up are presented for almost all ports in the affected area beginning at Puerto Aysen and working northward. Changes in water depth, caused by erosion, deposition, and changes in land elevation are reported.

The fates of several ships caught in the great waves are described in detail. Marigrams of the tsunami are given for all available Chilean ports.

The times of high and low tides in the Gulf of Chiloé changed following the earthquakes.

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