The event generated a large tsunami that was as high as on Hawai'i island and was detected in Alaska , California , Japan , Okinawa , Samoa , and on Johnston and Wake Islands . Significant changes to the shorelines along the southern coast of the Big Island with subsidence of was observed , causing some areas to be permanently submerged . The source of the event was the Hilina Slump , which was also responsible for the more powerful 1868 Hawaii earthquake and tsunami
1868 Hawaii earthquake
1868 Hawaii earthquake
1975 Hawaii earthquake