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Understanding Seismology: Earthquakes, Instruments, and Key Concepts

This overview explores the fundamentals of seismology, the scientific study of earthquakes. It covers essential concepts such as the role of seismologists, the function of seismographs in recording seismic waves, and the importance of seismograms in analyzing earthquake activity. Key terms include the Richter Scale, which measures earthquake strength, and the Moho, the boundary between the Earth's crust and mantle. Additionally, discover why the West Coast of the U.S. experiences more earthquakes due to its location in the Ring of Fire, a significant plate boundary region.

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Understanding Seismology: Earthquakes, Instruments, and Key Concepts

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Presentation Transcript

  1. DO NOW ______the point on the Earth’s surface directly above an earthquakes starting point ______ energy source that uses falling water ______lower layer of mantle ______pointy extinct volcano ______ instruments located at or near Earth’s surface that record seismic waves

  2. Earthquakes Key Questions What is seismology? What is a seismologist? What is a seismograph? What is a seismogram? What is the Richtor Scale? What is the Moho? Why does the west coast of the United States have more earthquakes?

  3. 1. Seismology-study of earthquakes • 2. Seismologist-scientist that studies earthquakes • 3. Seismograph-instruments located at or near Earth’s surface that record seismic waves • 4. Seismogram-tracing of earthquake motion created by a seismograph • 5. Richtor Scale-scale used to measure an earthquakes strength • 6. Moho-the boundary between the crust and mantle where seismic waves increase in speed • 7. The west coast has more earthquakes because it is in the Ring of Fire on a plate boundary

  4. Seismograph Lab • 1. What instrument did your group create? • 2. What did the pen mark represent? • 3. How did the line on the paper change from gentle shaking to stronger shaking?

  5. Words for Crossword Puzzle pg 196-213 • Seismic waves S waves • P waves elastic rebound • Seismology shadow zone • Focus epicenter • Fault moho • Seismograph gap hypothesis • Seismogram seismic gap • deformation

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