Examination and evaluation of real-time oceanographic data on the internet
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and OCEAN BASINS |
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ATMOSPHERE DYNAMICS |
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INTEGRATED TOPICS |
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Introduction to Questions on Earthquakes:
- The questions are outlined in four separate tables:
- question sets for California ( previous page , this page and next page )
- a question set for the Central and Eastern U.S. ( following page )
- Reminder: you should submit your answers via oncourse .
| California Earthquakes (contd.) | pt | |
| "Did You Feel It" and "Community Internet Intensity" Maps of Earthquakes | ||
| From the "
Index Map of Recent Earthquakes in California-Nevada
" follow the link entitled "Did you feel it?" to view a list of "Recent significant
events in the California region":
http://pasadena.wr.usgs.gov/shake/ca/
A general description of the information provided by the various shakemaps is given here . |
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| Select the "Pacific NW" tab to go to:
http://pasadena.wr.usgs.gov/shake/pnw/index.html
Select " Nisqually " to examine the "Community Internet Intensity Map" (shakemap) for the Feb 28 2001 earthquake of magnitude 6.8 in the Pacific Northwest ( X2281854 ) |
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| 6. | Does the intensity of the earthquake decrease steadfastly with distance from the epicenter (shown by a red star)? HINT |
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| 7. | What factors may influence the distributions of intensities shown on the map? (Bonus) HINT |
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| Examine the "Community Internet Intensity Map" (shakemap) for the three historic events: Hector Mine , Northridge and Loma Prieta . | ||
| 8. | Does the intensity of the earthquake for each of the events decrease steadfastly with distance from the epicenter (shown by a black star)? HINT |
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| 9. | For the three earthquakes does the perceived intensity of the earthquake in the shake maps correspond to their magnitudes in the table of historic events? HINT |
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| From the " Index Map of Recent Earthquakes in California-Nevada " follow the link entitled "Shakemaps - Southern CA " to view a list of "Maps of Recent Significant Events" in southern California at the ShakeMap Home Page. | ||
| Select the menu tab entitled " Map Archive " which takes you to a page entitled " Archive of ShakeMaps for 2002 ." Follow the link to " 1999 " and scan down the page to October 16 1999 and Event 910845, which corresponds to the record for the Hector Mine Earthquake of magnitude 7.1. Select the link to examine the "Trinet Rapid Instrumental Intensity Map" for this event, which was one of the earthquakes considered in Questions 8 and 9. ( 9108645 ) | ||
| 10. | Does the intensity of the earthquake decrease steadfastly with distance from the epicenter (shown by a black star)? HINT | 2 |
| 11. | How does this instrumental intensity map compare with the shakemap community internet intensity map from Question 8? Are the two generally similar, or are there any notable differences between them? HINT |
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Department of Geological Sciences,
1001 E. Tenth Street, Bloomington, IN 47405-1403
Phone: (812) 855-5582 Last updated: 1 October 2002
Comments: simon@indiana.edu
Copyright 2002, The Trustees of Indiana University