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EnglandGeologyQuick questions
Module 6: Geohazards
Quick questions on Volcanic hazards and monitoring: pyroclastic flows, lahars, monitoring methods and mitigation - OCR A-Level Geology
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is monitoring a volcano?Show answer
Unlike earthquakes, volcanoes usually give warning signs that can be monitored:
What are comparison with earthquakes?Show answer
Volcanoes are generally more predictable than earthquakes: because magma movement produces measurable precursors (seismicity, deformation, gas, heat), monitoring can often forecast an eruption days to weeks ahead and trigger evacuation. Earthquakes, by contrast, strike with essentially no short-term warning, so the defence is mitigation rather than forecasting.
What is q1?Show answer
Name the most lethal volcanic hazard and explain why it is so dangerous. [2 marks]
What is q2?Show answer
Describe one method of monitoring a volcano and what it reveals. [2 marks]
What is q3?Show answer
Explain why volcanoes are generally more predictable than earthquakes. [2 marks]
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