Population density

• What factors influence the perception of crowding in a playroom?

  Number of kids and size of playroom.
• What is the formula for calculating population density?

  • Population Density = Number of People / Size of Land
• What is the population size of the largest cities mentioned?

  15+ million
• Which city is denoted as a metropolitan area with a population of 9 million in 1950?

  Tokyo
• How is population density calculated?

  By dividing the number of people by land size
• What is the population threshold for a megacity according to the image?

  10 million
• Why are the largest cities extremely vulnerable to earthquakes?

  They lie in very high or high risk zones
• What is the relationship between population density and vulnerability?

  • Higher population density increases vulnerability
  • More people living closely together leads to greater exposure
  • Evacuation becomes more challenging during hazards
• What happens to hazard risk as density increases?

  Hazard risk goes up
• What is the relationship between megacities and seismic zones?

  • Megacities often lie along seismic zones
  • They create concentrated risk zones
  • Areas in red (e.g., Japan, India) are particularly vulnerable
• What happens to population density when more kids are playing in the playroom?

  It becomes very crowded.
• Which city is denoted as a metropolitan area with a population of 9 million in 1950?

  Tokyo
• What color zones indicate high risk for earthquakes?

  Yellow zones indicate high risk
• What makes high-density areas more vulnerable during a hazard?

  Increased difficulty in safe evacuation
• If 10,000 people live in 200 square kilometers, what is the population density?

  50 people per square kilometer
• What are the population ranges for the different sized megacities shown on the map?

  • More than 20 million
  • 10 to 14.9 million
  • 5 to 9.9 million
• What does population density indicate?

  How many people live in a specific area
• What is the definition of population density?

  It measures how crowded an area is.
• What color zones indicate very high risk for earthquakes?

  Red zones indicate very high risk
• What are the main challenges in disaster response and recovery due to high population density?

  Response Challenges:

  • Reaching survivors
  • Clearing debris
  • Distributing aid

  
  

  Recovery Challenges:

  • Providing housing
  • Restoring services
  • Rebuilding infrastructure
• What was the population of Tokyo during the 1923 Great Kanto earthquake?

  Over 2 million
• How does population density in rural Scotland compare to urban areas like Japan?

  It is significantly lower
• What can you infer about the population distribution in the United Kingdom based on the map?

  • The UK has high population density, with most areas having 50-250 people per square km or more than 250 people per square km.
  • Population is concentrated in certain regions, particularly in the southern parts of England.
• What are the population ranges for the different sized megacities shown on the map?

  • More than 20 million
  • 10 to 14.9 million
  • 5 to 9.9 million
• What do the different colors on the map represent in terms of population density?

  The colors represent different ranges of population density per square kilometer
• What does vulnerability refer to in this context?

  Exposure and susceptibility to hazards
• How can we visualize population density using a playroom analogy?

  • Few kids = not crowded
  • Lots of kids = very crowded
  • Count kids and measure playroom size
• Why is evacuation harder in crowded cities during an earthquake?

  More people live closely together
• What factor intensifies the risk from tectonic hazards in urban areas?

  High population density
• What was a consequence of Tokyo's dense population during the 1923 Great Kanto earthquake?

  Massive casualties due to crowded conditions
• How do dense populations affect all stages of disaster management?

  They worsen all stages from rescue to rebuilding
• How does poverty affect vulnerability to tectonic hazards?

  Poverty increases vulnerability dramatically
• What are the factors that increase vulnerability to tectonic hazards in urban areas?

  • High population density
  • Poverty
  • Poor building quality
• What is the population density shown on the map?

  World Global Population Density
• How does the population density in the United Kingdom compare to other parts of Europe based on the map?

  The UK has higher population density compared to many other parts of Europe
• What are the population density ranges shown on the map?

  • Less than 1 person per square km
  • 1 to 10 people per square km
  • 10 to 50 people per square km
  • 50 to 250 people per square km
  • More than 250 people per square km
• How does high population density affect disaster response and recovery?

  It makes response and recovery incredibly difficult
• What role does infrastructure damage play in disaster recovery?

  It makes movement even harder
• What hinders rescue efforts in densely populated areas during disasters?

  More people needing help and blocked routes
• How does the seismic hazard vary across different regions on the map?

  • Very high seismic hazard in certain regions
  • High seismic hazard in other regions
  • Moderate and low seismic hazard in some areas