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IS 1893:2025 Earthquake Code: New Zone VI Map

1 December 20251 min read
NATIONAL AFFAIRSIS 1893:2025Earthquake Code:New Zone VI Map1 December 2025safalsetu.com

Why in the news

India updated its earthquake design code, creating a top-risk zone and a model-based hazard map.

Key facts

  • Method: PSHA.
  • Boundary towns take the higher zone.
  • Himalayan Frontal Thrust ruptures may reach foothills such as Dehradun.
  • Fixings above 1% of total load (parapets, ceilings, tanks, facades, HVAC) must be anchored.
  • Near-fault buildings must resist pulse-like ground motion; soil rules cover liquefaction and site spectra.
  • PEMA exposure mapping combines population, infrastructure and vulnerability.

Exam angle

  • Highest zone: VI; publisher: BIS.

Test yourself

1. Which new seismic zone was created for the Himalayan arc in India's revised earthquake code IS 1893:2025?

The entire Himalayan arc was placed in newly created Zone VI.

2. Which body published the revised Earthquake Design Code IS 1893:2025?

The notes name the Bureau of Indian Standards as publisher.

3. Under IS 1893:2025, what share of India falls in moderate to high seismic hazard zones?

The revised map puts 61% of India in such zones.

This topic is part of Daily Current Affairs 28 & 29 November 2025 (23 topics).

All topics of the dayDay quizNovember 2025

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