The Same Earthquake, Two Completely Different Disasters
🌋 The Same Earthquake, Two Completely Different Disasters
Fourteen months later, on 22 February 2011, a magnitude 6.3 earthquake struck the New Zealand city of Christchurch. It was weaker than Haiti's earthquake. When the dust settled, 185 people had died.
The maths here should stop you in your tracks. Haiti's earthquake was roughly five times more powerful than Christchurch's. Yet it killed 1,700 times more people. The buildings in Port-au-Prince, mostly built with no enforcement of construction codes, collapsed like cardboard. The buildings in Christchurch, built to strict New Zealand seismic standards, largely held. Emergency services in New Zealand deployed within minutes. In Haiti, the earthquake destroyed the government's own offices, killing civil servants and leaving the state barely able to function. International aid took days to arrive. Cholera, carried in contaminated water, later killed a further 10,000 people — a death toll that would not have happened in a country with functioning water infrastructure.
This is the central lesson of natural hazards geography: physical magnitude does not determine disaster magnitude. Vulnerability, preparedness, and the choices societies make before disaster strikes determine whether an earthquake kills 185 people or 316,000.
Geography glossary
- What is a natural hazard?
- A natural event that threatens people or property.
- What does risk mean in hazards?
- The chance that people or places will be harmed by a hazard.
A natural hazard is a naturally occurring physical event — such as an earthquake, volcanic eruption, tropical storm, flood, or wildfire — that poses a threat to human life, property, or livelihoods. The critical word is "threat": the event only becomes a hazard when people are in its path.
Earn the mark scheme marks
🧠 Memory Aids: PEARL and VERT
PEARL — Factors Affecting Vulnerability
Use PEARL to remember the five factors that make communities vulnerable to natural hazards. These apply to any hazard question asking "why are some communities more at risk?"
- P — Poverty: Cannot afford earthquake-resistant buildings, early warning systems, or to relocate
- E — Education: Lower awareness of what to do when disaster strikes; cannot act on warnings
- A — Access: Remote communities cannot receive emergency aid quickly after a disaster
- R — Resilience: Countries with experience and investment in preparedness cope far better
- L — Location: Living near fault lines, active volcanoes, coastlines, or floodplains increases exposure
VERT — Factors Affecting Hazard Impact
Use VERT for questions asking "what factors affect the impact of a natural hazard?"
- V — Vulnerability of the population (PEARL factors above)
- E — Emergency response capacity (quality of emergency services; government capability)
- R — Resilience and preparedness (building codes, early warning, drills, community knowledge)
- T — Type and magnitude of hazard (physical characteristics of the event itself)
Key Contrasts for Exam Quick Reference
| Comparison | LIC Result | HIC Result |
|---|---|---|
| Haiti 2010 (7.0 Mw) vs Christchurch 2011 (6.3 Mw) | ~316,000 deaths | 185 deaths |
| Nepal 2015 (7.8 Mw) vs Chile 2010 (8.8 Mw) | ~9,000 deaths | ~550 deaths |
| Bangladesh Cyclone Bhola 1970 vs Cyclone Sidr 2007 | ~500,000 deaths (no warning) | ~3,400 deaths (3 million evacuated with warnings) |
Note: The Bangladesh comparison shows that even within one LIC, investment in preparedness dramatically reduces deaths — the physical hazard was similar; the preparedness was not.
Now try it yourself
Quiz · Question 1 of 16
Which of the following is the best definition of a natural hazard?
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