638c2855_cale_and_the_Richter_magnitude__tremor
[degree] X [description] Most buildings and their foundations are destroyed. Some bridges are destroyed. Dams are seriously damaged. Large landslides occur. Water is thrown on the banks of canals, rivers, lakes. The ground cracks in large areas. Railroad tracks are bent slightly. [tremor] 
most disastrous
Mercalli scale and the Richter magnitude
tremor