1 / 25

Warm-up Week 12 Day 1

Warm-up Week 12 Day 1. The Lithosphere includes Earth’s C_______ and part of the M_________. What are the three types of plate boundaries called? Describe what happens at each type of plate boundary. How can dogs tell that a major earthquake is about to happen? (What might they feel ?).

charissa-harmon
Télécharger la présentation

Warm-up Week 12 Day 1

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Warm-up Week 12 Day 1 • The Lithosphere includes Earth’s C_______ and part of the M_________. • What are the three types of plate boundaries called? • Describe what happens at each type of plate boundary. • How can dogs tell that a major earthquake is about to happen? (What might they feel?)

  2. “Measuring Earthquakes” Chapter 8, Section 2

  3. Earthquake Waves • “Seismic” = … • Surface waves travel along the ground and cause the ground and anything resting upon it to move • Gases and liquids do not transmit s waves, but do transmit p waves • A seismogram shows all three types of waves: the p waves arrive first, then the s waves, followed by the surface waves last • The waves arrive at different times because they travel at different speeds

  4. Surface Waves • Wavesthat travelalong Earth’s surface • Most destructive! 

  5. P Waves • “Push-Pull waves” • Compressrocks • Expand rocks • FASTEST waves!

  6. S Waves • Shaketheparticlesatright angles • Cannotmove throughwaterorair.

  7. Seismograph Toolthat recordsearthquakewaves

  8. “Seismos” = Shake “Gramma” = What is written Seismogram A drawingfrom aseismograph

  9. Where are they?!

  10. Travel-Time Graph • Used to finddistancetoepicenter

  11. Finding an Epicenter. • Triangulation • Technique used to find location of epicenter • “Three Circles”

  12. Measuring Earthquakes • Intensity • Estimate of damage to an area. • Magnitude • Size of seismic wave

  13. 3 Scales of Measurement • Richter Scale • Outdated • Measures amplitude of the largest seismic wave (1-10). • Moment Magnitude Scale • Widely used  • Movement at fault • Measures energy released • Modified Mercalli Scale • Measures “Destruction” • 12 steps ( I—XII ) • 1 = Gentle, 12 = Bad!

  14. Moment Magnitude Scale

  15. Modified Mercalli Scale

  16. “Earthquake Destruction”

  17. Q: What affects the amount of Destruction? • How bigthe seismic waves are. • Howlong it lasts. • Compositionof ground. • Designof buildings.

  18. Hazard - Liquefaction Niigata, Japan 1964

  19. Hazard – Ground Shaking Northridge, CA 1994 Loma Prieta, CA 1989

  20. Hazard – Surface Faulting Landers, CA 1992

  21. Hazard - Landslides Turnnagin Heights,Alaska,1964

  22. Hazard – Fires Loma Prieta, CA 1989

  23. Hazard – Tsunami

  24. Predicting Earthquakes? • Goal: • EARLY WARNING. • Success? • NO.  • Seismic gap • Place along a fault that is “overdo.”

  25. Chance of Earthquakes Near Us…

More Related