Parts of a Fault and Seismic waves (MS-ESS2-2 Lesson 3)
Presentation
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Science
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6th - 9th Grade
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Practice Problem
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Medium
Standards-aligned
Jeffrey Sabol
Used 19+ times
FREE Resource
16 Slides • 3 Questions
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Parts of a Fault and Seismic Waves
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Explore the diagram and the description
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Multiple Choice
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Multiple Choice
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Multiple Choice
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Seismic Waves
Lets shake things up a bit and learn about the three main types of Seismic Waves.
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Primary waves (P)
The first wave to arrive
Travels thru solid, liquid, gas
Push Pull motion
(P)rimary, (P)ush (P)ull
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Secondary Waves (S)
(S)econd To arrive (S)lower
(S)ide to (S)ide motion
Travels thru (S)olids only
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Surface (L) Land Waves
Slowest wave
Causes the most damage
Up, Down, and Around motion
Travels thru solids and liquids
("ocean wave" on land)
(* higher level study both Rayleigh & Love surface waves)
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Seismographs
Tool used to detect movement in the Earth's Crust
Records the intensity and timing of the arrival of earthquake waved.
Alone, cannot determine direction earthquake waves came from.
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Finding the Epicenter
P waves travel at a known fast speed
S waves travel at a known slower speed
The distance between the arrival between the P & S waves determines the distance to the epicenter from the seismograph.
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Finding the Epicenter
Apply the arrival times to graph.
Read the result and you will find the distance to the epicenter.
Do this with multiple seismograph readings
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Finding the Epicenter (cont.)
Plot the distances from each seismograph on a map
Where all the circles intersect is your epicenter.
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Parts of a Fault and Seismic Waves
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