Earthquake zones of India
The
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Revised earthquake hazard zone map of India
National Center for Seismology
The National Center for Seismology Ministry of Earth Sciences is a nodal agency of the Government of India dealing with various activities in the fields of seismology and allied disciplines. The major activities currently being pursued by the National Center for Seismology include a) earthquake monitoring on a 24/7 basis, including real time seismic monitoring for early warning of tsunamis, b) operation and maintenance of national seismological network and local networks, c) seismological data centre and information services, d) seismic hazard and risk related studies, e) field studies for aftershock/swarm monitoring and site response studies and f) earthquake processes and modelling.[4]
The MSK (Medvedev-Sponheuer-Karnik) intensity broadly associated with the various seismic zones is VI (or less), VII, VIII and IX (and above) for Zones 2, 3, 4 and 5, respectively, corresponding to
Each zone indicates the effects of an earthquake at a particular place based on the observations of the affected areas and can also be described using a descriptive scale like the
Zone 5
Zone 5 covers the areas with the highest risk of suffering earthquakes of intensity
Zone 4
This zone is called the High Damage Risk Zone and covers areas liable to MSK VIII. The IS code assigns a zone factor of 0.24 for Zone 4.
Zone 3
This zone is classified as a Moderate Damage Risk Zone which is liable to MSK VII. The IS code assigns a zone factor of 0.16 for Zone 3. Several megacities like Chennai, Mumbai, Pune, Kolkata and Bhubaneswar, Jamshedpur, Ahmedabad, Surat, Lucknow, Vadodara, Mangalore, Vijayawada and the entire state of Kerala lie in this zone.
Zone 2
This region is liable to MSK VI or lower and is classified as the Low Damage Risk Zone. The IS code assigns a zone factor of 0.10 for Zone 2. It is the zone with low chances of having earthquakes. Cities like Bangalore, Hyderabad, Visakhapatnam, Nagpur, Raipur, Gwalior, Jaipur, Tiruchirappalli and Madurai are in this zone.
Zone 1
Since the current division of India into earthquake hazard zones does not use Zone 1 no area of India is classified as Zone 1.
See also
Notes
- ^ "Earthquake risk: Check which parts of India are in top seismic zone".
- ^ "Earthquake Hazards and the Collision between India and Asia". Archived from the original on 2006-09-19. Retrieved 2006-05-13.
- ^ "Indian cities under threat of storms & earthquakes by 2050: World Bank & United Nations". The Times Of India. 2011-12-09.
- ^ "Seismology". Archived from the original on 2015-05-17. Retrieved 2015-04-27.
- ^ "Vulnerability Zones in India". Retrieved 2006-05-13.
- ^ "Lessons learned from the Gujarat earthquake - WHO Regional Office for South-East Asia". Archived from the original on 2002-08-25. Retrieved 2006-05-13.
Further reading
- Saikia, Arupjyoti. "Earthquakes and the Environmental Transformation of a Floodplain Landscape: The Brahmaputra Valley and the Earthquakes of 1897 and 1950." Environment and History 26.1 (2020): 51–77.