After the 1975 earthquake, there was a greater emphasis on monitoring the motion of the south flank. Hawaiian Volcano Observatory and the University of Hawaiʻi at Mānoa installed continuous GPS ...

HONOLULU (HawaiiNewsNow) - Fifty years ago, in November 1975, scientists at the Hawaii Volcanoes Observatory knew something ...

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 ...

This is U.S. Geological Survey aerial view shows the lower East Rift Zone during Kilauea volcano’s 2018 eruption. Johanson said the study found that the 1975 quake was a “dividing line,” where ...

A nearly 50-year-old earthquake fundamentally changed the evolution of Kilauea, scientists at the University of Hawaii say. According to a study by UH Manoa researchers, a 7.7-magnitude earthquake ...

Regional map of the southeast portion of the Big Island of Hawai'i with elevation and bathymetry contours and surface fault traces (top panel). Cross‐section of the A‐A′ profile shown on top and ...

OROVILLE — Fifty years ago today, on Aug. 1, 1975 at 1:21 p.m., citizens in the City of Gold and surrounding areas were rocked by a 6.1 magnitude earthquake, the largest quake in the city’s history ...