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Earthquakes

Earthquakes. How do we measure an Earthquake?. We can measure Earthquakes using one of two main scales. Richter Scale Mercalli Scale. Mercalli Scale. In 1902 Guiseppe Mercalli devised a scale for measuring the intensity of an earthquake by relating it to the amount of damage it caused.

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Earthquakes

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  1. Earthquakes

  2. How do we measure an Earthquake? • We can measure Earthquakes using one of two main scales. • Richter Scale • Mercalli Scale

  3. Mercalli Scale • In 1902 Guiseppe Mercalli devised a scale for measuring the intensity of an earthquake by relating it to the amount of damage it caused. • In 1931 seismologists modified his scale to adapt to modern American building standards.

  4. Finding the Epicenter • We can use Mercalli’s modified scale to find the epicenter of an earthquake. • Today’s activity is a dramatization based on an actual earthquake that occurred in Wattsville, California in 1971. • The next few slides are recordings from a local radio station that had callers phone in observations that they could make from their location.

  5. KWAT Radio

  6. Caller A

  7. Caller B

  8. Caller C

  9. Caller D

  10. Caller E

  11. Caller F

  12. Caller G

  13. Caller H

  14. Caller I

  15. Caller J

  16. Caller K

  17. Caller L

  18. Caller M

  19. Caller N

  20. Caller O

  21. Caller P

  22. Caller Q

  23. Caller R

  24. Caller S

  25. Caller T

  26. Caller U

  27. Caller V

  28. Final Task • Now that you are finished marking down the number on the Mercalli scale for each location you want to begin to connect similar numbers on your map. • Be sure to look over your map carefully and draw lines that contain each number. SEE EXAMPLE • Put a star where you think the epicenter would be located.

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