What does Tectonic Hazards cover in Eduqas A-Level Geography?

Tectonic Hazards is the compulsory Section A of Component 3 (Contemporary Themes in Geography). It covers the structure of the Earth and plate tectonics, the types of plate boundary and hotspots and the global distribution of hazards, the nature and measurement of earthquakes, volcanic eruptions and tsunamis and their primary and secondary impacts, the concepts of risk, vulnerability and resilience and the hazard risk equation, hazard prediction, monitoring and management, and multi-hazard environments.

How is Component 3 assessed?

Component 3 (Contemporary Themes in Geography) is a written paper of 2 hours 15 minutes worth 128 marks, 32 per cent of the A level. Section A is Tectonic Hazards (compulsory for all students), and Section B is two optional themes chosen from Ecosystems, Economic Growth and Challenge, Energy Challenges and Dilemmas, and Weather and Climate. The paper rewards extended, evaluative essay answers supported by located case studies.

What case studies do I need for Tectonic Hazards?

You need several contrasting tectonic events, ideally including one in a developed country and one in a developing or emerging country, and across different boundary types. The classic contrasting pair is the 2010 Haiti earthquake (developing, high impact) and the 2011 Tohoku earthquake and tsunami (developed). Add a volcanic case (Mount Pinatubo 1991 for monitoring and evacuation) and a multi-hazard environment (the Philippines, Japan).

What is the hazard risk equation?

Risk equals hazard multiplied by vulnerability divided by capacity to cope. It shows that the impact of a tectonic event depends not only on the physical magnitude of the hazard but on how vulnerable the population is and how well it can cope, both largely set by development and governance. It is why a smaller earthquake in a poor, densely populated, weakly governed place can kill far more people than a larger one in a developed, well-prepared country.

What are the most common mistakes in Tectonic Hazards?

Explaining impacts by magnitude alone (ignoring vulnerability and capacity to cope); confusing the plate boundary types and forgetting that conservative and collision boundaries have no volcanoes; confusing magnitude (energy) with intensity (shaking felt) and forgetting the magnitude scale is logarithmic; treating a tsunami as a primary rather than secondary impact; claiming earthquakes can be reliably predicted; and listing management strategies without evaluating which work in which context.

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Eduqas A-Level Geography Tectonic Hazards (Component 3, Section A): a deep dive on plate tectonics, hazards, vulnerability and management

A deep-dive Eduqas A-Level Geography guide to Tectonic Hazards (Component 3, Section A, compulsory): plate tectonics and hazard distribution, the nature and impacts of earthquakes, volcanoes and tsunamis, the hazard risk equation and vulnerability, hazard management and the Park model, and multi-hazard environments, with contrasting case studies.

Generated by Claude Opus 4.818 min readA110QSUpdated 2026-06-02

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

Jump to a section

What this section actually demands
Plate tectonics and the distribution of hazards
Earthquakes, volcanoes and tsunamis
Vulnerability and resilience
Management and response
Multi-hazard environments
How this section is examined
Check your knowledge

What this section actually demands

Tectonic Hazards is the compulsory Section A of Component 3, the highest-weighted component. The demand is to explain why tectonic hazards occur (plate tectonics), what they do (the nature and impacts of earthquakes, volcanoes and tsunamis), why impacts vary (the hazard risk equation, vulnerability and resilience), and how risk is managed (prediction, the management cycle, mitigation), all the way to the complexity of multi-hazard environments. Because Component 3 rewards extended, evaluative essays, the central skill is judgement: weighing physical against human controls, evaluating the effectiveness of management, and supporting conclusions with contrasting located case studies.

This guide ties together the five dot-point pages for the section: plate boundaries and distribution, earthquakes volcanoes and tsunamis, vulnerability and resilience, management and response, and multi-hazard environments. Each has its own page with practice questions; this overview shows how they fit.

Plate tectonics and the distribution of hazards

The Earth's rigid lithosphere is divided into plates moving over the asthenosphere, driven by mantle convection, ridge push and slab pull. Hazards cluster at boundaries: constructive (gentle volcanoes, small quakes), destructive (subduction, explosive volcanoes, deep quakes, tsunamis), conservative (strong quakes, no volcanoes) and collision (fold mountains, strong quakes). Hotspots make volcanoes away from boundaries. This explains the Pacific Ring of Fire and the global distribution.

Earthquakes, volcanoes and tsunamis

Earthquakes radiate from a focus (epicentre above), measured by magnitude (logarithmic moment scale) and intensity (Mercalli). Volcanoes range from effusive to explosive (the VEI), with hazards including pyroclastic flows and lahars. Tsunamis are secondary sea waves from seabed displacement. Impacts are primary (immediate, direct) and secondary (indirect, often deadlier), and social, economic and environmental.

Vulnerability and resilience

A hazard becomes a disaster where it meets a vulnerable population. Risk = hazard x vulnerability / capacity to cope. Vulnerability is raised by poverty, density, weak governance, poor buildings and low preparedness; resilience is the capacity to recover. So development and governance often determine the death toll more than magnitude, the Haiti versus Tohoku contrast.

Management and response

Management uses prediction, monitoring and forecasting (volcanoes are forecastable; earthquakes are not), the hazard management cycle (mitigation, preparedness, response, recovery) and the Park model of recovery. Mitigation uses aseismic building design, planning, education and warning. Effectiveness varies with development, and management reduces but cannot eliminate risk, especially from secondary hazards.

Multi-hazard environments

A multi-hazard environment (disaster hotspot) faces several overlapping hazards (tectonic plus storms, floods, landslides) that can compound. People stay for benefits (fertile soils, resources), constraints (poverty, attachment) and risk perception. Reducing risk needs integrated, multi-hazard planning, with development and governance decisive, the Philippines versus Japan contrast.

How this section is examined

A typical Eduqas profile for Tectonic Hazards:

Resource and data skills (AO3). Read distribution maps, magnitude data and hazard diagrams precisely.
Process and concept (AO1). Explain boundary types, hazard formation and the risk equation.
Extended evaluation (AO2). Assess why impacts vary, evaluate management effectiveness, and judge the challenges of multi-hazard settings, with contrasting case studies.

Check your knowledge

A mix of questions covering the whole section. Attempt them under timed conditions, then check against the solutions.

Name the four main types of plate boundary. (2 marks)
Explain why explosive volcanoes occur at destructive plate boundaries. (3 marks)
Distinguish between the focus and the epicentre of an earthquake. (2 marks)
Explain why the secondary impacts of a tectonic hazard can be greater than the primary impacts. (3 marks)
State the hazard risk equation. (2 marks)
Explain why a lower-magnitude earthquake can cause more deaths than a higher-magnitude one. (3 marks)
Name the four stages of the hazard management cycle. (2 marks)
Explain why volcanoes are easier to manage than earthquakes. (3 marks)

Solutions

Q1: Constructive (divergent), destructive (convergent), conservative (transform) and collision boundaries.
Q2: Oceanic plate subducts and melts, and water released lowers the melting point, generating silica-rich, viscous (andesitic) magma that traps gas, so the build-up of pressure produces explosive eruptions.
Q3: The focus is the point at depth where the fault ruptures and energy is released; the epicentre is the point on the surface directly above the focus.
Q4: Secondary impacts (tsunamis, landslides, liquefaction, fire, disease) can affect far larger areas and populations and persist for years, often killing more people than the immediate shaking or eruption, as the Tohoku tsunami did.
Q5: Risk equals hazard multiplied by vulnerability divided by capacity to cope.
Q6: If the lower-magnitude quake strikes a place with high vulnerability (poor buildings, dense poverty) and low capacity to cope (weak governance, limited services), its death toll can far exceed that of a larger quake in a developed, well-prepared country.
Q7: Mitigation, preparedness, response and recovery.
Q8: Volcanoes give detectable warning signs (seismicity, ground deformation, gas) that monitoring can use to forecast eruptions and evacuate in advance, whereas earthquakes give no reliable short-term warning, so earthquake management must rely on mitigation built beforehand.