25. Hypocentre – Primary
The chapter explores the concept of the hypocentre, the point within the Earth where an earthquake rupture begins, emphasizing its importance for seismic analysis and engineering practices. It covers the characteristics and classification of hypocentres, the generation of seismic waves, techniques to determine their location, and the implications for structural design and earthquake preparedness. Furthermore, the chapter reviews advancements in hypocentre detection methods and the relationship between hypocentre parameters and performance-based earthquake engineering.
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What we have learnt
- The hypocentre is the point of origin for seismic waves during an earthquake.
- Shallow-focus earthquakes are most destructive due to their proximity to the surface, while deep-focus events provide insights into deep Earth structures.
- Techniques like triangulation and seismic tomography are essential for accurately locating hypocentres.
Key Concepts
- -- Hypocentre
- The exact point within the Earth where an earthquake rupture initiates, often referred to as the focus of the earthquake.
- -- Seismic Waves
- Waves of energy that travel through the Earth's layers, including primary (P) waves and secondary (S) waves.
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