Earthquakes I (Junior Cert Geography): Flashcards

Sudden shaking of Earth's crust from tectonic plate movement

Deep cracks in Earth's crust where movement occurs

Point beneath Earth's surface where earthquake starts

Point on Earth's surface above focus (strongest shaking)

Smaller tremors following the main earthquake

Instrument to detect & record earthquake vibrations

Measures strength/magnitude of earthquake

1 (no damage) to 12 (total destruction)

Large wave formed after underwater earthquake

Up to 30 metres