Answer: The earthquake will be 1000 times more intense when it is measured 8 on the Richter scale.
Explanation: Richter scale is the numerical scale which measures the intensity of earthquake with the help of seismographic oscillations.
Each level on the Richter scale is 10 times stronger than the previous one.
Richter scale measuring 8 is three levels up than the value 5 on the scale.
Hence, the earthquake having 8 on the Richter scale will be ( 10 × 10 × 10) = 1000 times more intense than the earthquake having 5 on the Richter scale.