Seismic Zones of India (IS 1893)
IS 1893 divides India into four seismic zones, each with a zone factor (Z) representing expected ground motion.
| Zone | Seismic intensity | Zone factor Z |
|---|---|---|
| II | Low | 0.10 |
| III | Moderate | 0.16 |
| IV | Severe | 0.24 |
| V | Very severe | 0.36 |
Zone factor Z per IS 1893 (Part 1). Higher zones require greater seismic design consideration; light solar structures are usually wind-governed but are still checked.
Frequently asked questions
- How many seismic zones does India have?
- Four — Zones II, III, IV and V, with zone factors 0.10, 0.16, 0.24 and 0.36 respectively.
Related resources
Need engineered structures to these standards?
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