Before revision: The magnitude of these displacements is obtained by integrating twice (acceleration is the second time derivative of displacement) the difference of the apllied acceleration and the critical acceleration with respect to time.USGS - Geologic Hazards: Figure 2.
After revision: The magnitude of these displacements is obtained by integrating twice (acceleration is the second time derivative of displacement) the difference of the applied acceleration and the critical acceleration with respect to time.USGS - Geologic Hazards: Figure 2.