From Dehradun to Uttarkashi...the danger of earthquake has increased, no district of Uttarakhand is now included in the low risk area.

Dehradun: There has been a big change regarding earthquake risk in India. Recently, Bureau of Indian Standards (BIS) has released a new earthquake design code and updated seismic zonation map. In this new map, for the first time the entire Himalayan region has been placed in the most risky Zone-VI, after which now the entire area of Uttarakhand has also been included in the most risky areas.

Earlier, large parts of Uttarakhand like Dehradun, Rishikesh and Kotdwar were kept in Zone-IV and Dharchula, Munsiyari, Nainital, Uttarkashi were kept in Zone-V. Now after the implementation of the new map, all parts of the state have been placed in the highest earthquake risk category.

Know the scientific approach regarding maps

Let us tell you that the work of seismic zoning mapping is done by BIS. He said that the biggest change has been made in the new map regarding the Himalayan region. Earlier, Uttarakhand was divided into two zones, in which Dharchula, Munsiyari and Uttarkashi were in Zone-5 and Dehradun, Rishikesh, Kotdwar were in Zone-4. Based on the new data, now the entire state has been included in Zone-6.

When was the map made for the first time
The first earthquake map of India was prepared by the Geological Survey of India (GSI) in 1935. The country was then divided into three categories – severe, mild and moderate risk areas. After this, BIS made changes in the map from time to time. Six zones were created in 1962, seven zones in 1966 and five zones (I to V) in 1970. But old maps were based only on areas where earthquakes had occurred before.

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The new 2025 map now focuses entirely on scientific data, activation of fault lines and computer modeling. The old map had four zones (II, III, IV, V), while the new map includes five zones (II, III, IV, V and the new VI). According to the new map, the entire Himalayan region has been considered as the most risky Zone-VI.

Also read: Danger increased in UP cities, Noida-Ghaziabad in earthquake map, Bahraich-Saharanpur now in ‘high-risk zone’

Danger level as per new zone
, Zone II: Very low risk, 11% area.
, Zone III: Moderate danger, 30% area.
, Zone IV: High danger, 18% area.
, Zone V: Very high risk, 11% of the area.
, Zone VI: Most at risk, entire Himalayan region.

After this change, a new era has started in construction, urban planning and infrastructure security in Uttarakhand. Now engineers and urban planners will not depend on old estimates, but safety standards will be implemented on scientific basis.