Natural hazards

To ensure successful technical application to disaster management, has to be seamlessly integrated into established policies, plans, operational procedures and infrastructure.

This section provides an overview by offering a summary of characteristics, impact and damage types, emergency action, mitigation, and further measures for the different types of natural hazards.

The information currently provided is by no means complete, and any user of this website is invited to contribute content and/or to provide feedback. Please use the contact form on this page to contact the editing team.

  1. In general, drought is defined as an extended period - a season, a year, or several years - of deficient rainfall relative to the statistical multi-year average for a region. However, dozens of more specific drought definitions are used around the...
  2. The scale of earthquakes is commonly measured by Richter scale which compares the maximum heights of the seismic waves at a distance of 100 kilometers from the point on the earth's surface directly above where the earthquake originated within the...
  3. An epidemic is defined as the occurrence of an illness or health-related event that is unusually large or unexpected. Epidemics are commonly caused by a disease of infectious or parasitic origin. Infectious diseases such as cholera, meningococcal...
  4. Changes in temperature extremes tend to follow mean temperature changes in many parts of the world. IPCC indicate that cold extreme cold extremes warm faster than warm extremes by about 30% – 40% globally averaged (Andreas Strerl et al, 2008). Many...
  5. A simple definition of flooding is water where it is not wanted. Another, more comprehensive definition of a flood is:  A general and temporary condition of partial or complete inundation of normally dry land areas from overflow of inland or tidal...
  6. Mass movements are massive failures of slope masses including rock, debris, soils and snow/ice (Parkash, National Institute of Disaster Management, New Delhi). These mass movements are sometimes associated with other disaster such as earthquakes,...
  7. “Tsunami” is a Japanese word in which “tsu” means harbor and “nami” means wave. Thus the word means “harbor wave”. Tsunami is a series of waves that can travel at speeds averaging 450 (and up to 600) miles per hour in the open ocean. Most of...
  8. A volcano is a mountain opening downwards to the reservoir of molten rock towards the surface of earth. Volcanoes are made by the accrual of igneous products. As the pressure from gases in the molted rock becomes intense, the eruption takes place....
  9. A wildfire is an unplanned, unwanted wild land fire (including unauthorized human-caused fires). Vegetation fires are caused by slash/burn land clearing, clearing of plantations following logging operations, and by natural events such as lightning ...


There is one more phenomenon called sinkholes. Sinkholes are common where the rock below the land surface is limestone, carbonate rock, salt beds, or rocks that can naturally be dissolved by groundwater circulating through them.If there is not enough support for the land above the spaces then a sudden collapse of the land surface can occur. These collapses can be small, or they can be huge and can occur where a house or road is on top.

To add with Haydean there are some pictorial evidence of Sinkholes occured in different parts of the world.


Add new comment

Filtered HTML

  • Web page addresses and e-mail addresses turn into links automatically.
  • You may use [block:module=delta] tags to display the contents of block delta for module module.
  • Each email address will be obfuscated in a human readable fashion or, if JavaScript is enabled, replaced with a spam resistent clickable link. Email addresses will get the default web form unless specified. If replacement text (a persons name) is required a webform is also required. Separate each part with the "|" pipe symbol. Replace spaces in names with "_".
  • Lines and paragraphs break automatically.
  • Allowed HTML tags: <b> <i> <hr> <strike> <sub> <sup> <table> <tr> <td> <tbody> <thead> <h1> <h2> <h3> <h4> <h5> <p> <a> <br> <em> <strong> <cite> <code> <ul> <ol> <li> <dl> <dt> <dd> <img>

Messaging plain text

Plain text

  • No HTML tags allowed.
  • You may use [block:module=delta] tags to display the contents of block delta for module module.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.
By submitting this form, you accept the Mollom privacy policy.
Zircon - This is a contributing Drupal Theme
Design by WeebPal.