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8.1: Why It Matters- Earthquakes

8.1: Why It Matters- Earthquakes

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Lumen Learning
Lumen Learning

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Interpret types, causes, effects, and scientific measurements of earthquakes and seismic waves

Introduction

Have you ever wondered why California or Japan has so many earthquakes? Have you ever been in an earthquake and felt the solid ground shake beneath your feet?

Imagine you are going about your normal routine for the day and it is time for you to wrap up your day to head home. As you start gathering your things to take home and work your way out to your car, the following happens (note that this video and the next contain no significant audio):

A link to an interactive elements can be found at the bottom of this page.

This earthquake measured a 9.0 on the Richter scale and was the most powerful earthquake to hit Japan and the fourth most powerful recorded by humans. Aftershocks numbered over 1,000, with some over a 6.0 on the Richter scale. Almost 16,000 people died, over 6,000 were injured, and 2,500 were missing. The earthquake also damaged a nuclear facility causing major radioactive leaks. The World Bank estimated the economic cost of damage at $235 billion!

Once the shaking subsided, the following happened:

Thumbnail for the embedded element "Incredible footage of Incoming Tsunami Japan."

A YouTube element has been excluded from this version of the text. You can view it online here: http://pb.libretexts.org/geo/?p=270

Learning Outcomes

Investigate the causes and common locations of earthquakes
Compare and contrast properties and mechanics of different types of waves
Define and compare magnitude versus intensity.
Understand the hazards of earthquakes and recognize our limited ability to predict seismic activity.

Contributors and Attributions

Authored by: Kimberly Schulte and Lumen Learning. Provided by: Lumen Learning. License: CC BY: Attribution

Huge Landslide and Hill Collapse after Massive Earthquake in Nepal (2015). Authored by: viralTV. Located at: https://youtu.be/Say2HiVwqTU. License: All Rights Reserved. License Terms: Standard YouTube License

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