Madhav AgarwalAIR 16 · CSE 2024 · 202 wordsTheir whole copy
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There major earthquake zones:
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There major earthquake zones: → 1 Circum Pacific Zone (67%) → 2 Mid Continental Zone (21%) → 3 Mid oceanic Ridges.
Arrows depict plate movements.
Earthquake are massive release of energy caused by friction of plates as per the Plate Techonic theory.
Mechanisms of Earthquake :
(1) The radioactive decay within earth's interior creates strains of energy.
(2) This strains are suddenly released in form of seismic waves →
(3) The point where the energy is released is Focus & the point above the surface is Epicentre.
(4) The movement of plates over the aesthenosphere also creates boundaries:
| Convergence | Divergence | Transform |
|---|---|---|
| → ← | ← → | ↑ ↓ / ↓ ↑ |
| Eurasian Plate, Indo Aus Plate | Mid oceanic Ridges | San Andreas Fault in North America |
(5) Can also be anthropogenic: → Reservoir Induced seismicity: Koyna Reservoir, India.
India's vulnerability to earthquakes is 58% land in Zone III to Zone V.
Earthquake related distress like Landslides, change of river course, Glacial lake Outburst flood, etc.
To reduce impact of earthquake we need Retrofitting of old buildings, earthquake resilient structures, Hazard Zonation as well enforcement of techno legal regime (National Building Code) along with Awareness & capacity generation.
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India's vulnerability to earthquakes is 58% land in Zone III to Zone V. Earthquake related distress like Landslides, change of river course, Glacial lake Outburst flood, etc.
To reduce impact of earthquake we need Retrofitting of old buildings, earthquake resilient structures, Hazard Zonation as well enforcement of techno legal regime (National Building Code) along with Awareness & capacity generation.