‘Largest Hawaii earthquake’: 50th anniversary of devastating Kalapana earthquake, tsunami on Hawaiʻi Island

Nov. 29, 2025 marks the 50th anniversary of the largest Hawaiʻi earthquake–a magnitude-7.7 with over 30 seconds of shaking across the islands of Hawaiʻi, Maui and Oahu–in the 20th and 21st century, U.S. Geological Survey said in a press release