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Earthquake

The document outlines the nature of earthquakes, including their causes, types, and historical significance, such as the largest earthquake in Bio-Bio, Chile, and the deadliest in Shaanxi, China. It explains how earthquakes are measured using seismometers to determine magnitude and intensity. Additionally, it provides resources for further information on earthquakes and their impacts.

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3 views2 pages

Earthquake

The document outlines the nature of earthquakes, including their causes, types, and historical significance, such as the largest earthquake in Bio-Bio, Chile, and the deadliest in Shaanxi, China. It explains how earthquakes are measured using seismometers to determine magnitude and intensity. Additionally, it provides resources for further information on earthquakes and their impacts.

Uploaded by

sam3458
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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Informative Speech Detailed Outline Rough Draft

Earthquake
An earthquake is the moving of the surface of the earth as a result of the Earth's lithosphere that
makes seismic waves.
If this moves happened in the ocean or sea, it can cause a tsunami. Earthquakes can also create
volcanic activities or landslides.
There are three types of natural earthquakes: 1. Strike-slip. 2. Normal. 3. Reverse
Strike-slip is like two different earth surfaces moving in a different direction. One is trying to go
left and the other is trying to go right side.
A normal earthquake is two earth surfaces are going in opposite directions. Normal earthquakes
are giving less damage to the earth's surface.
A reverse fault is the two earth surfaces are going to each other. One of them getting dominant
over the other and the dominant side of the earth's surface gets higher than the other side.
The biggest earthquake happened in Bio-Bio, Chile. It happed in 1960. The magnitude was 9.5.

The most deadly earthquake in history was in Shaanxi, China in 1556. The earthquake magnitude was 8.
It’s estimated to have killed 830,000 people. More than 97 counties in China were affected.

There is a website you can check the earthquakes where, when, and what was the magnitude.
https://earthquake.usgs.gov/earthquakes/map/?extent=-7.88515,-150.99609&extent=66.93006,-
38.84766&map=false

How Are Earthquakes Measured?


What is magnitude?
Seismometers record the vibrations from earthquakes that travel through the Earth. Each seismometer
records the shaking of the ground directly beneath it. Magnitude is the size of the earthquake. An
earthquake has a single magnitude. The shaking that it causes has many qualities that fluctuate from one
spot to another depending on distance, kind of surface material, and different components.
What is intensity?
How much the ground shakes at a specific location. Intensity describes how strong the shaking is at a
given location. In the United States and many other locations, intensity values are described with Roman
numerals from I to X, using the Modified Mercalli Intensity scale. This definition of intensity requires a
subjective judgment by an observer. For instance, if the shaking is strong enough to awaken most people,
then the intensity will be assigned a level of V.

Work Site Page

https://www.usgs.gov/natural-hazards/earthquake-hazards/science/20-largest-earthquakes-world?
qt-science_center_objects=0#qt-science_center_objects
https://ourworldindata.org/the-worlds-deadliest-earthquakes
https://scienceexchange.caltech.edu/topics/earthquakes/earthquakes-measured

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