Earthquakes and Seismology
Earthquakes are vibrations caused by sudden movement along faults, recorded by seismometers and measured by magnitude.
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Earthquakes are vibrations caused by sudden movement along faults, recorded by seismometers and measured by magnitude.
- Seismic waves include P and S waves
- The focus is underground
- Buildings can be designed to withstand shaking
🧠 Quick quiz
Three questions. Score 2 or more to complete the topic.
What is Earthquakes and Seismology?
Within Earth & Environmental Science, which covers our planet, its resources and ecosystems, and how people can protect the environment, this topic explains Earthquakes and Seismology. Earth and environment topics show how the planet’s systems shape landscapes, climate and life, with models that make these processes visible.
Check that you can explain Earthquakes and Seismology in your own words and give one example from everyday life. If you can do that, you have understood the core idea.
Understanding Earthquakes and Seismology helps you explain the environment around you and weigh up how people can protect it.
Earthquakes and Seismology in detail
Earthquakes occur when stress built up along faults is suddenly released, sending out seismic waves. The focus is where the rupture starts, and the epicentre is the point directly above on the surface. P-waves (primary) are compressional and fastest, S-waves (secondary) are shear waves, and surface waves cause most damage.
Seismologists record waves with seismographs. Magnitude, measured on the moment magnitude scale, shows energy released, with each whole number about 32 times more energy, and the Mercalli scale measures the effects. Most occur at plate boundaries. Damage depends on strength, depth, ground type and building design, and earthquakes can trigger tsunamis and landslides. Prediction is not possible, but hazard mapping and preparedness reduce risks.
How the interactive helps you understand Earthquakes and Seismology
Watch the tectonic plates in the interactive. Use any sliders or buttons it offers to change the values and see how the tectonic plates responds.
Before you change anything, predict the result. Then change one value at a time and check whether your prediction was right. This is a quick way to build a correct mental model of Earthquakes and Seismology.
Real-life uses and examples
- Explain how Earthquakes and Seismology affects the landscape or climate near you.
- Link Earthquakes and Seismology to a real environmental problem and a possible solution.
- Use a diagram of Earthquakes and Seismology to describe the steps of a process in order.
Common mistakes to avoid
- Describing a process without the timescale it works over.
- Presenting one cause as the only cause of an environmental change.
- Learning the definition without testing it. Use the quiz and the interactive to check that you can apply the idea.
Frequently asked questions about Earthquakes and Seismology
What is Earthquakes and Seismology?
Earthquakes are vibrations caused by sudden movement along faults, recorded by seismometers and measured by magnitude.
What are the most important points about Earthquakes and Seismology?
The main points are: Seismic waves include P and S waves; The focus is underground; Buildings can be designed to withstand shaking.
Why is Earthquakes and Seismology useful?
Understanding Earthquakes and Seismology helps you explain the environment around you and weigh up how people can protect it.
How can I practise Earthquakes and Seismology?
Open the interactive at the top of this page and change the controls one at a time. Predict the result before each change, then take the three-question quiz. A score of two or more marks the topic as complete on this device.
Which topics are related to Earthquakes and Seismology?
Related topics in Earth & Environmental Science include Weather Elements, Storms and Extreme Weather, Climate Change Evidence.