Eduqas GCSE Geography A · C111
Component 1, Component 2, Component 3
Revise: Quantitative Map Skills and Data InterpretationEarthquake magnitude is estimated using the amplitude of ground motion recorded by a seismometer, with corrections for distance. Amplitude means the size of the vibration. A one-unit increase on the Richter scale corresponds to ten times the recorded seismic-wave amplitude.