An earthquake of magnitude 5 is significantly more intense than one of magnitude 3, with ground movement intensity increasing by a factor of 100. This is derived from the logarithmic scale where each whole number increase in magnitude represents a tenfold increase in amplitude and approximately 31.6 times more energy release. Participants in the discussion emphasize the importance of attempting calculations rather than relying on others for answers. Misunderstandings about the formulas and their applications are noted, highlighting the need for careful reading of the question. Overall, the conversation underscores the mathematical relationship between earthquake magnitudes and their intensities.