basics

• what is a natural event

  • natural thing which occurs but doesn't endanger human life or property
  • naturally occurring
• what is an atmospheric hazard

  • created in the atmosphere by the movement of AIR and WATER
  • eg tornado, hurricane etc
• what is a tecnonic hazard

  • created by the movement of the earth's tectonic plates
  • eg earthquake, volcano, tsunami etc
• what is oceanic crust

  • newer - less than 200ma old
  • more dense
  • can sink
  • can be renewed/destroyed
• what is continental crust

  • older - more than 1500 ma
  • less dense
  • can't sink
  • cant be renewed or destroyed
• what are factors affecting hazard risks

  • level of development
  • magnitude
  • location
  • population
• how does level of dev impact hazard risk

  • prediction, preperation - cities such as Tokyo plan and approve buildings which are protected for earthquakes ie they must be able to sway. You can also track and warn those affected
  • governance - police and army can help and reduce chaos
  • poverty - can't afford equipment or plan to protect against hazard
• how does magnitude affect hazard risk

  • area impacted - dependant on magnitude
  • size and strength - how frequent and magnitude
• how does location affect hazard risk

  • relief - sea level will be more impacted by tsunami than mountains
  • vegetation - may effect accesibility ie tpr
  • CLIMATE CHANGE - more heat and rain can give a tropical storm more energy and therefore increase size and strength and frequency