RGSC: Precariously balanced rocks. Anna Rood.
Anna Rood, Department of Civil and Environmental Engineering, Imperial College London
Precariously balanced rocks are ancient formations found throughout the world where a slender boulder is balanced in such a way as to be vulnerable to being pushed over by earthquake shaking. These natural balancing acts provide a geological record of seismic shaking of large, rare earthquakes, a record that could drastically improve estimates of future earthquake ground shaking.