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Earthquakes in Delhi
Why is it in News?
- 11 mild earthquakes in Delhi since May
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- Most powerful of the 11 earthquakes was of magnitude 3.4
- Area around Delhi - most dense concentration of seismometers anywhere in the country - even more than the Himalayan region
- 16 out of 115 detectors in country are in Delhi
- Delhi region does not lie on any fault lines or any plate boundary => prediction of earthquake is difficult
- In Delhi region – earthquakes due to ‘internal deformities’
- Magnitude of earthquake is measured on logarithmic scale
(1) Magnitude 6 – release of energy – equivalent to atom bomb of Hiroshima
(2) Magnitude 7 – 32 times more powerful compared to magnitude 6
(3) Magnitude 8 – 1000 times more powerful compared to magnitude 6
- National Centre for Seismology in Delhi
- National Geophysical Research Institute (NGRI), Hyderabad