Skip to main content
Super TutorResources
Chapter 8 of 18
QuestionsNotesFlashcardsSummaryFormulasQuizConceptsSyllabusPlan
Syllabus

Earthquakes

ICSE · Class 9 · Geography

Complete topic list for Earthquakes in ICSE Class 9 Geography. Key concepts, sub-topics, and what to focus on for board exams.

53 questions34 flashcards5 concepts

Interactive on Super Tutor

Studying Earthquakes? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for syllabus and more.

Try Super Tutor — Free

1,000+ Class 9 students started this chapter today

A cross-section diagram showing the Earth's crust and mantle, clearly indicating the seismic focus (hypocenter) where an earthquake originates, and the epicenter on the Earth's surface directly above
Super Tutor

Learn better with visuals Super Tutor has hundreds of illustrations like this across every chapter — all free to try.

Get started
4 Topics · ICSE Class 9 Geography

Topics in Earthquakes

1

1. Meaning and Basic Terms

  • An earthquake is a sudden vibration or movement of part of the Earth’s crust.
  • The seismic focus is the origin point inside the crust or mantle where the rocks suddenly move.
  • The epicentre is the point on the Earth’s surface directly above the focus.
2

2. Causes of Earthquakes

  • Earthquakes are caused by volcanic eruptions, folding and faulting, plate tectonics, and anthropogenic factors.
  • Volcanic earthquakes are caused by gas explosions and may occur before or during an eruption.
  • A fault is a fracture in a rock with observable displacement.
3

3. Measurement of Earthquakes

  • The magnitude of earthquakes is commonly assessed by the Richter Scale.
  • The Richter Scale was devised by Charles F. Richter in 1935.
  • It was modified in 1965 by Richter and Beno Gutenberg.
4

4. Distribution of Earthquakes in the World

  • There are three major earthquake belts in the world and a fourth category called interplate seismicity.
  • The Circum-Pacific Belt is a convergent plate boundary belt and accounts for about 66% of the world’s earthquakes.
  • The Mid-Atlantic Belt is a divergent plate boundary belt caused mainly by seafloor spreading.

Key Concepts

Central concept: Earthquakes

MeaningMeasurementCausesVolcanic EruptionsFolding and FaultingPlate TectonicsAnthropogenic FactorsDistribution of Earthquakes

Frequently Asked Questions

What are the important topics in Earthquakes for ICSE Class 9 Geography?
Key topics in Earthquakes include Earthquakes – Complete Chapter Overview, Earthquakes — Chapter Overview Mind Map, Earthquakes – Full Chapter Concept Hierarchy. These are the concepts ICSE Class 9 examiners draw on most — study them first, then practise related questions.
How to score full marks in Earthquakes — ICSE Class 9 Geography?
Understand the core concepts first, then work through the 53 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Earthquakes

All 18 chapters — ICSE Class 9 Geography Syllabus

For serious students

Get the full Earthquakes chapter — for free.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for ICSE Class 9 Geography.

Try Super Tutor Free
Try the full chapter — Free