The Great Pyramid of Giza in Egypt has survived more than 4,500 years. Earthquakes have repeatedly shaken the region, including the magnitude 5.8 Cairo earthquake in 1992, which dislodged some of the pyramid’s outer casing stones. Yet the main body remained essentially intact.
How has it survived so well? A new study of the pyramid’s vibrations by Egyptian geophysicist Asem Salama and colleagues provides insight into its performance during earthquakes, and identifies some interesting features.
