Earthquake Zoning Map India: BIS Withdrawal of Revised Seismic Hazard Framework
26 March 2026
Earthquake Zoning Map India: BIS Withdrawal of Revised Seismic Hazard Framework
Earthquake Zoning Map India has come under focus after the Bureau of Indian Standards (BIS) withdrew its proposed revision introducing a probabilistic seismic hazard assessment framework. The rollback highlights concerns over rising construction costs, infrastructure planning challenges, and balancing disaster safety with economic development.
Why in the News?
The
Bureau of Indian Standards (BIS)
recently
withdrew its proposed revision of India’s earthquake zoning map
.
The revision was notified in
November 2025
, but it was
rolled back on March 3, 2026
after criticism from engineers, policymakers, and industry stakeholders.
The proposed changes had major implications for
urban planning, infrastructure development, disaster preparedness, and construction costs
.
What are the Key Highlights?
Existing earthquake zoning system
India currently follows a
fixed seismic zoning model
.
This system divides the country into
zones based on earthquake risk
.
The zoning is used to guide
building standards and infrastructure design
.
Proposal to shift to a modern framework
BIS attempted to move toward
Probabilistic Seismic Hazard Assessment (PSHA)
.
PSHA is a
probability-based scientific method
used globally.
It estimates earthquake risk by
simulating possible ground motion and earthquake intensity
.
Introduction of a new high-risk category
The proposed framework introduced a
new high-risk category called Zone VI
.
This zone covered:
Most of
Kashmir
Parts of the
Himalayan region
Kutch
Parts of
North-East India
Concerns raised by experts and policymakers
Some engineers argued that the
methodology used in the revision was not fully aligned with site-based evaluations
.
Urban planners feared that stricter zoning could
slow down development in economically weak regions
.
High cost implications
Increasing the seismic zone classification can
increase construction costs
.
Estimates show:
One-zone increase
may raise building costs by about
20%
.
Two-zone increase
may raise costs by
nearly one-third
.
Major infrastructure projects such as:
Metro rail
Dams
Power stations
could face
even higher costs
.
Government departments raising concerns
Objections came from several government institutions, including:
Ministry of Housing and Urban Affairs
Ministry of Home Affairs
Central Water Commission
National Dam Safety Authority
Impact on housing sector
Around
80% of houses in India belong to the informal sector
.
Higher construction costs may
push more people into unsafe informal housing
.
Climate dimension
The
construction sector is a major source of carbon emissions in India
.
Changes in building standards may
increase material use and emissions
.
What is the Significance?
Strengthening Disaster Preparedness
Accurate earthquake zoning helps
design safer buildings and infrastructure
.
It reduces
loss of life and property during earthquakes
.
Improving Urban Planning
Proper zoning helps planners decide
where and how cities should expand
.
It ensures
safer location of buildings, transport systems, and public utilities
.
Protecting Critical Infrastructure
Infrastructure such as:
Dams
Highways
Power plants
Metro systems
requires strong
earthquake-resistant design standards
.
Supporting Climate-Resilient Development
Modern infrastructure planning must consider
both disaster risk and climate change
.
Safe and durable structures reduce
reconstruction and environmental damage
.
Aligning with Global Scientific Practices
The shift toward
Probabilistic Seismic Hazard Assessment aligns India with global standards
.
It improves
scientific accuracy in earthquake risk estimation
.
Challenges
High Construction Costs
Stricter seismic standards can significantly
increase construction expenses
.
This can affect:
Housing projects
Public infrastructure
Private sector investment.
Impact on Infrastructure Development
Higher costs may
slow down development projects
.
Economically weaker regions may face
delays in infrastructure growth
.
Expansion of Informal Housing
Increased building costs may
push people toward cheaper and unsafe housing
.
Informal housing is already
very common in India
.
Methodological Concerns
Some engineers believe that the
scientific methods used in the new zoning framework need further validation
.
Lack of detailed
site-based assessments
has been criticized.
Coordination Issues Among Institutions
Several ministries and regulatory bodies have
different views on the revision
.
Lack of coordination can delay policy implementation.
Environmental Concerns
Stronger buildings may require
more steel, cement, and construction materials
.
This can increase
carbon emissions from the construction sector
.
Way Forward
Conduct Wider Scientific Consultation
The government should involve:
Seismologists
Structural engineers
Urban planners
This will improve the
accuracy and acceptance of zoning frameworks
.
Use Detailed Local Risk Assessments
Earthquake risk should be studied through
site-specific assessments
.
Local geological conditions must be considered before assigning zones.
Balance Safety and Development
Policies should ensure
both safety and economic feasibility
.
Development should not be completely restricted in high-risk areas.
Promote Affordable Earthquake-Resistant Construction
Governments should encourage
low-cost earthquake-resistant building technologies
.
Financial incentives can support safer construction.
Strengthen Institutional Coordination
Ministries and regulatory agencies must
work together to create a unified policy framework
.
This will improve
implementation and monitoring
.
Integrate Climate and Disaster Policies
Urban planning must combine
earthquake safety with climate mitigation goals
.
Sustainable construction materials and techniques should be promoted.
Conclusion
India’s rapid infrastructure growth requires careful planning to protect people and assets from natural hazards. Scientific knowledge, economic realities, and environmental concerns must be balanced while designing safety standards. A thoughtful and collaborative approach can help create stronger cities and safer communities for the future.
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