Explain how a tsunami is formed.

At a tectonic plate boundary, a earthquake occurs. This causes a large release of pressure and a tectonic plate to jolt upwards, causing a water displacement column. As a result, waves with a low frequency, low amplitude and a long wavelength ripple out in all directions. As these waves begin to get closer to the shoreline, friction with the sea bed begins to increase causing the wave to slow down. Whilst friction levels increase, the wave length shortens, the wave amplitude increases. Eventually the wave gets to such a height it breaks, thus causing a fully formed tsunami.

JF
Answered by James F. Geography tutor

16223 Views

See similar Geography A Level tutors

Related Geography A Level answers

All answers ▸

What is the difference between high energy and low energy coasts?


To what extent do urban areas in lower income countries (LICs) or newly emerging economies (NEEs) provide social and economic opportunities for people?


What is the difference between re-imaging, re-branding and regeneration of place


Describe how a river erodes material from its beds and banks. 3 marks


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences