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Which technology enables real-time earthquake early warning by detecting P-waves before destructive S-waves arrive?
- Seismometer Networks
- GPS Monitoring
- Satellite InSAR
- All of these
Answer: All of these
Earthquake early warning systems use: dense seismometer networks for P-wave detection, GPS for crustal deformation, and satellite InSAR for post-event analysis. India's system (under NDMA) provides seconds to minutes of warning for automated actions (train braking, gas shutoff). Critical for seismic risk mitigation questions.