Download Earthquake Measurements

Earthquake Measurements
Quick Write
In this chapter, you will learn about
earthquakes and their causes?
Write down these questions and
answer them in complete sentences.
1. How are EQs measured?
2. Where are most EQs found?
3. Why are there no EQs larger than
9.8?
1. Amount of energy
releases by an EQ?
Magnitude.
2. Magnitude reported
with?
Richter Scale.
3. Richter Scale values?
0.1 to about 9.8
maximum.
4. Modified
Mercalli Scale?
Measures EQ
intensity.
5. Intensity?
Examples of
damages to the
crust or buildings.
Example I to XII.
6. Locating EQs?
Need at least three
seismic stations.
Check for Understanding
Movie
The Richter Scale measures _____, while the
Modified Mercalli Scale measures ______.
Intensity/Magnitude or Magnitude/Intensity
A value of 7.7 is from the ______, while
a value of VII is from the ______.
Richter Scale/MMS or MMS/Richter Scale
7. Seismic belt?
Locations where EQs
are common.
8. Where are seismic
belts normally found?
At plate boundaries.
9. What other hazards
are found at plate
boundaries?
Volcanoes.
10. Can EQs be
found away
from plate
boundaries?
Yes, hot spots
have many EQs
too.
11. Why can’t there be Richter Scale values higher
than 9.8?
The Earth’s crustal rocks aren’t strong enough to
handle enough stress and strain to store that much
energy.
Check for Understanding
Movie
A location where many earthquakes
are found is called a _____ _____. Many
earthquakes occur at _____ _____.
Seismic Belt/Plate Boundaries or PB/SB
Why can’t EQs larger than about 9.8 occur?