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011-46509848

GeoHazards Society
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Earthquakes

An earthquake results from sudden movement when two blocks of earth  slip past one another. It includes tremors & vibrations of the  surface of the earth. In a densely populated location, an earthquake may  result in damage, loss of property, and fatalities. According to the  Maximum Considered Earthquakes, India is divided into four seismic zones  namely Zone-II, Zone-III, Zone-IV, and Zone-V) where Zone-V expects the  highest level of seismicity and Zone II is considered to be the lowest  level of seismicity. 

Seismic Zone and Intensity on the MSK scale

Zone-II (Low Damage Risk Zone) - VI or less

Zone-III (Moderate Damage Risk Zone) - VII

Zone-IV (High Damage Risk Zone) - VIII

Zone-V (Very High Damage Risk Zone) - IX or more

To find out which zone your district falls in, please use https://vai.bmtpc.org/eq.html


WIND

WIND

The coastal regions of India are worst affected by cyclones every  year. Tropical cyclones occur in the months of May-June and  October-November. India is geographically divided into six wind zones as  follows:

Wind Zones and Basic Wind Speed in m/s

Very High Damage risk Zone - A55

Very High Damage risk Zone - B50

High Damage Risk Zone - 47

Moderate Damage Risk Zone - A44

Moderate Damage Risk Zone - B39 

Low Damage Risk Zone - 33

Please use  https://vai.bmtpc.org/wind.html to learn about the wind zone in your state.


FLOOD

FLOOD

We all know that many Indian states are highly prone to floods. 80%  of precipitation occurs in the monsoon months from June to September  resulting in cloudbursts, floods & urban flash floods in many  regions. The flood map of India is available here: https://vai.bmtpc.org/flood.html for your kind reference.



LANDSLIDES

LANDSLIDES

Landslides/rockfalls/mudflows are various forms of mass wasting where  a significant portion of the debris placed on the loose soil moves  downwards.  The landslides are often triggered by heavy rainfall, an  earthquake, or a manmade slope cut.

Please verify whether your location is prone to landslides using https://vai.bmtpc.org/landslide.html.



Useful Resources

  1. National Disaster Management Authority
  2. National Institute of Disaster Management
  3. Southern California Earthquake Center
  4. Earthquake Engineering Research Institute (EERI)
  5. Federal Emergency Management Agency (FEMA)
  6. Multidisciplinary Center for Earthquake Engineering Research (MCEER)
  7. National Information Center of Earthquake Engineering at IIT Kanpur (NICEE), INDIA
  8. National Information Service for Earthquake Engineering
  9. National Hazards Center, Boulder CO
  10. The Pacific Earthquake Engineering Research Center
  11. USGS Earthquake Hazards Programme
  12. The Seismological Society of America
  13. Amateur Seismic Center


PREPAREDNESS LINKS

  1. Earthquake Country Alliance
  2. Ready.gov
  3. International Federation of Red Cross and Red Crescent Societies
  4. American Red Cross
  5. Citizen Preparedness by FEMA


By providing links to other sites,  GeoHazards Society does not guarantee, approve, or endorse the  information or products available on these sites


Copyright © 2025 Geohazards Society - All Rights Reserved.

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