October 2, 1906 Tsunami: Bismarck Sea, Papua New Guinea

Reference #414:

On October 2, 1906 at 11:35 a.m. [local time], validity 3, the strongest aftershock of the earthquake on Sept 14, 1906, occurred. This earthquake was again followed by tidal waves which lasted a little less than 2 hours in Finsh Harbor. Although the water level rose only 1 m above the normal mark, the movement of the water was much stronger than it had been a month ago.

Reference #99:

1906, October 2. At 1 p.m. the tidal disturbances commenced. It was then about half tide; the sea was very calm, and but little wind blowing. The water suddenly ran out about 30 feet further than the lowest usual low water mark, and as suddenly ran back to considerably higher than the usual high water level, flooding all the surface of the foreshore of Buna Bay, and flowing under all the houses to a depth of about 6 inches. The ebb and flow continued at intervals of about 3 minutes for about half an hour. During this time some excitement prevailed, as it was impossible to judge how far each succeeding flow might rise. At the lowest point during the ebb the reefs in the bay were all exposed to view, apparently about 2 feet more than at usual lowest tides. At the flow the water broke in great waves against the western side of the Bay, and came in a steady flood gradually but quickly rising on the eastern side of the bay. The total rise and fall of water was 8 feet. The tidal disturbance after the first half-hour gradually became less severe and at longer intervals until about 4 p.m. it was very slight.