A 7.0 earthquake, with the epicenter significantly inland, occurred shortly after sundown and was followed 20 minutes later by a 5.9 aftershock. We think the initial quake triggered a landslide on the sea floor, probably on the order of four or five cubic kilometers. The wave arrived onshore five to 10 minutes after the initial quake.The block discussed in the article is probably an order of magnitude larger than the one that caused the New Guinea tsunami.