What are vague measures?

Name specific actions (earthquake-resistant buildings, tsunami warning systems, drills) rather than "be more prepared".

SingaporeGeographySyllabus dot point

How can communities prepare for and respond to earthquakes, eruptions and tsunamis to reduce harm?

Explain how people prepare for, predict and respond to tectonic hazards

A focused answer to the O-Level Geography outcome on managing tectonic hazards. Prediction and monitoring, protection through building design and defences, preparation and education, and immediate and long-term response, and why wealth makes a difference, with a worked walkthrough.

Generated by Claude Opus 4.89 min answerUpdated 2026-06-06

Reviewed by: AI editorial process; not yet individually human-reviewed

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What this dot point is asking
The answer
Examples in context
Try this

What this dot point is asking

SEAB wants you to explain how people prepare for, predict and respond to tectonic hazards to reduce harm. The central insight is that while we cannot stop earthquakes, eruptions or tsunamis, we can greatly reduce the damage and deaths through prediction and monitoring, protection, preparation, and effective response, and that a country's wealth strongly shapes how well it can do this.

The answer

Prediction and monitoring

Forecasting a hazard buys time to act, but it is easier for some hazards than others:

Volcanoes can often be predicted. They give warning signs that scientists monitor: small earthquakes increase, the ground bulges as magma rises, and gas emissions and temperatures change. These allow forecasts and timely evacuation.
Earthquakes are much harder to predict. The sudden slip of a locked fault gives no reliable warning of the exact time, so prediction is limited; instead, the focus is on preparation.
Tsunamis can be warned of after an undersea earthquake: warning systems detect the earthquake and ocean changes and send alerts to coasts, giving people time to flee to high ground.

Protection

Protection reduces the harm when a hazard strikes:

Earthquake-resistant buildings are designed to sway and absorb shaking without collapsing, using flexible frames, deep foundations and cross-bracing.
Tsunami defences such as sea walls and raised land, and evacuation routes to high ground, reduce flooding deaths.
Land-use planning keeps building away from the most dangerous zones (such as the slopes of an active volcano).

Preparation and education

Preparing people saves lives:

Education and drills: teaching people how to react (for an earthquake, "drop, cover and hold") and holding regular drills.
Emergency plans and supplies: stocking food, water and medical kits, and planning evacuation.
Trained emergency services: ready rescue teams and hospitals that can respond fast.

Response

Response is what happens during and after the event:

Immediate response: search and rescue, emergency medical care, evacuation and shelter, restoring water and power.
Long-term response: rebuilding homes and infrastructure (ideally stronger), supporting livelihoods, and improving defences and planning for next time.

Why wealth makes a difference

Richer countries can afford resistant buildings, monitoring and warning systems, trained emergency services and rapid rebuilding, so they usually suffer fewer deaths. Poorer countries often have weaker buildings, limited warning and emergency services and slow recovery, so similar hazards can be far deadlier. Preparation and response, more than the hazard's size, often decide the death toll.

Worked example

A country at risk from earthquakes and tsunamis wants to reduce future deaths. Recommend and justify a strategy covering prediction, protection, preparation and response. [8 marks]

Step 1: Prediction and warning

Recommend installing a tsunami warning system that detects undersea earthquakes and ocean changes and alerts coastal communities, and monitoring for any usable signs. Justify that, since earthquakes themselves cannot be reliably predicted, fast warning for the tsunami that may follow gives people time to flee to high ground.

Step 2: Protection

Recommend enforcing earthquake-resistant building codes (flexible frames, deep foundations) and building tsunami defences such as sea walls and clearly marked evacuation routes to high ground. Justify that resistant buildings prevent collapse deaths and defences reduce flooding harm.

Step 3: Preparation and education

Recommend educating the population and holding regular earthquake and tsunami drills, stocking emergency supplies, and training rescue teams. Justify that people who know to drop, cover and hold, and to move to high ground when the sea draws back or an alert sounds, react faster and survive.

Step 4: Response and conclude

Recommend ready search-and-rescue and medical teams for the immediate aftermath and plans to rebuild stronger afterwards. Conclude that combining warning, protection, preparation and response greatly reduces deaths even though the hazards cannot be prevented. A balanced strategy across all four areas earns full marks.

Common traps

Claiming earthquakes can be reliably predicted: Volcanoes and tsunamis can be warned of, but the exact time of an earthquake cannot be reliably forecast; emphasise preparation instead.
Confusing prediction, protection, preparation and response: Keep them distinct: predicting (forecasting), protecting (buildings, defences), preparing (education, drills, supplies) and responding (rescue, rebuilding).
Saying nothing can be done: Although hazards cannot be stopped, many measures greatly reduce deaths and damage.
Ignoring the wealth difference: A strong answer notes that richer countries can fund these measures and so usually suffer fewer deaths than poorer ones.
Vague measures: Name specific actions (earthquake-resistant buildings, tsunami warning systems, drills) rather than "be more prepared".

Examples in context

Example 1. Japan's earthquake and tsunami preparedness. Japan invests heavily across all four areas: strict earthquake-resistant building codes, an extensive tsunami warning system and sea walls, nationwide drills and education, and well-equipped emergency services. During the 2011 Tohoku disaster these measures saved many lives even though the tsunami's scale overwhelmed some defences, showing how a wealthy, well-prepared country can limit, though not eliminate, the toll.

Example 2. The Indian Ocean Tsunami Warning System. After the 2004 disaster, which struck with no regional warning, countries around the Indian Ocean cooperated to build a tsunami warning system of sensors and alerts so that future undersea earthquakes trigger warnings to coastal communities. It is a clear example of learning from a catastrophe to improve prediction and preparation, aiming to give people the precious minutes needed to reach safety.

Try this

Q1. Explain why volcanic eruptions are often easier to predict than earthquakes. [2 marks]

Cue. Volcanoes give monitorable warning signs before erupting (rising small earthquakes, ground bulging as magma rises, changing gas and temperature), whereas the sudden slip of a locked fault gives no reliable warning of the exact time of an earthquake.

Q2. Describe two ways a community can prepare for a tsunami to reduce deaths. [2 marks]

Cue. Install a warning system and clearly marked evacuation routes to high ground, and educate people and hold drills so they move to safety quickly when the sea draws back or an alert sounds; tsunami sea walls are also acceptable.

Q3. Explain why richer countries often suffer fewer deaths from tectonic hazards than poorer ones. [2 marks]

Cue. Richer countries can afford earthquake-resistant buildings, warning systems, defences, education and well-trained emergency services and rapid rebuilding, while poorer countries have weaker buildings and limited warning, services and recovery, so similar hazards are deadlier there.

Exam-style practice questions

Practice questions written in the style of SEAB exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.

Original6 marks(a) Describe two ways people can prepare for an earthquake to reduce its impact. (b) Explain why volcanic eruptions can often be predicted while earthquakes are much harder to predict.

Show worked answer →

(a) Two ways: first, constructing earthquake-resistant buildings designed to sway and absorb shaking without collapsing (using flexible frames, deep foundations and cross-bracing), which reduces deaths from collapse. Second, educating people and holding regular earthquake drills so they know how to react (drop, cover and hold, then move to safety), along with emergency plans, supplies and trained rescue services that speed up the response.

(b) Volcanic eruptions can often be predicted because volcanoes give warning signs that can be monitored: small earthquakes increase, the ground bulges as magma rises, and gas emissions and temperatures change. Scientists track these to forecast an eruption and order evacuation. Earthquakes are much harder to predict because the sudden slip of a locked fault gives no reliable warning signs in advance, so the exact time of an earthquake usually cannot be forecast.

Markers reward two clear preparation measures (earthquake-resistant building, education and drills) and the contrast: volcanoes show monitorable warning signs while earthquakes strike suddenly without reliable precursors.

Original5 marksExplain why richer countries often suffer fewer deaths from tectonic hazards than poorer countries, even for hazards of similar size.

Show worked answer →

Richer countries can afford to invest in measures that reduce deaths. They build earthquake-resistant buildings and tsunami defences, install and run monitoring and warning systems, and fund well-equipped, well-trained emergency and rescue services that respond quickly.

They can also educate their populations and hold regular drills so people know how to react, and they have the resources for rapid medical care, search and rescue, and rebuilding after an event.

Poorer countries often cannot afford these measures: buildings are weaker and more likely to collapse, warning systems and emergency services are limited, and recovery is slow. So for hazards of similar size, the better preparation and response in richer countries usually mean fewer deaths.

Markers reward the link between wealth and the ability to fund prediction, protection (resistant buildings, defences), preparation (education, drills) and rapid response, and the contrast with poorer countries' limited resources.