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13 Cards in this Set

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Recording of the three types of earthquakeswaves
Seismogram
The type of earthquake wave that shakes particles at right angles to their direction of travel
S waves
Is this true or false? On a seismogram, the greater the interval is between the arrival of the first P wave and the first S wave, the greater the distance to the earthquake source.
true
Is this true or false? You can use travel-time graphs from two seismographs to find the exact location of an earthquake epicenter
false
Most major earthquakes occur around the outer edge of what ocean
Pacific
The active earthquake areas i nteh circum-Pacific belt are
Japan, the philippines, Chile, and Alaska's Aleutian islands
What two types of measrements do scientists use to descrive the size of earthquakes
intensity and magnitude
Derived from the amount of displacement that occurs along a fault zone
moment magnitude scale
based on the amplitude of the largest seismic wave recorded on a seismogram
Richter scale
measure of the size of seimic waves or amount of energy released at the earthquake source
magnitude
measure of the amount of earthquake shaking at a location based on damage
intensity
What is the most widely used measurement for earthquakes?
Moment magnitude
Why is moment magnitude that most widely used measurement for earthquakes
it is the only magnitude scale that estimates the energy released by earthquakes.