magnitude_intensity

# magnitude_intensity - Module Number Shaking ground Linking...

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Shaking ground Linking Earthquake Magnitude and Intensity How does the magnitude of an earthquake impact shaking? How does shaking impact intensity and destruction? Prepared for SSAC by Eric Baer - Highline Community College © The Washington Center for Improving the Quality of Undergraduate Education. All rights reserved. *YEAR* Quantitative concepts and skills Logarithmic Scales and Exponential scaling Graph reading Circle geometry (calculating the area of a circle) Exponential Functions Roman numerals Module Number 1

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Earthquake magnitude is commonly used to represent the size of an earthquake. However, most people want to understand how much impact or damage earthquakes do. These two concepts are linked by shaking. Earthquake magnitude can be measured in a variety of ways, most commonly moment magnitude or Richter magnitude. Shaking is measured in units of acceleration, (often a percentage of g ). Damage or intensity can be measured by the modified Mercalli intensity (MMI) scale. Problem How does the magnitude of an earthquake impact the amount of shaking one feels and the extent of damage? 3 Amount of shaking ( g ) Magnitude and Location Intensity (MMI)
Slides 4-9 Relate magnitude and shaking (acceleration) Slides 10-12 Relate shaking to intensity Slides 13-14 Analyze and present results Slide 15 Questions at the end Overview of Module Earthquakes cause damage. The damage is determined not only by the magnitude of the earthquake, but how far you are away from the epicenter of the earthquake. In this lab you will explore how these factors impact shaking and damage. 2

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Relating Magnitude, Distance and Acceleration Predictions of damage from an earthquake are not easy to make, and require several critical assumptions. Two assumptions we will make are: •That there are no local soil effects (such as liquefaction) •That ground shaking will cause the damage (i.e., no tsunami, large fires, etc.) The amount of shaking at a specific location in an earthquake is dependent on 3 factors: •Distance to the focus •Magnitude of the quake •Local effects, such as soft-sediment amplification (which we will ignore).
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magnitude_intensity - Module Number Shaking ground Linking...

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