There are five seismic zones named as I to V
as details given below:
Zone V: Covers the areas liable to
seismic intensity IX and above on Modified Mercalli Intensity Scale. This
is the most severe seismic zone and is referred here as Very High Damage
Risk Zone.
Zone IV: Gives the area liable to
MM VIII. This, zone is second in severity to zone V. This is referred here
as High Damage Risk Zone.
Zone III: The associated intensity
is MM VII. This is termed here as Moderate Damage Risk Zone.
Zone II: The probable intensity is
MM VI. This zone is referred to as Low Damage Risk Zone.
Zone I: Here the maximum intensity
is estimated as MM V or less. This zone is termed here as Very Low Damage
Risk Zone.