What are the names of the two main faults near Chaffey College? A. The San Andreas Fault Zone, San Bernardino Mountains Section (South Branch SAF) and The San Jacinto fault zone, San Bernardino section (Lytle Creek fault) B. The San Jacinto fault zone, San Bernardino section (Lytle Creek fault) and the Sierra Madre fault zone, Cucamonga section (Cucamonga fault) C. The Red Hill-Etiwanda Avenue fault (Etiwanda Avenue fault) and the Sierra Madre fault zone, Cucamonga section (Cucamonga fault) D. The San Andreas Fault Zone, San Bernardino Mountains Section (South Branch SAF) and the Red Hill-Etiwanda Avenue fault (Etiwanda Avenue fault) Part Two: Major Active Faults in Southern California Go to the following website, which has a clickable map to find out information about some of the major active faults in Southern California. http://scedc.caltech.edu/significant/faults-socal.html Click on the extreme southern end of California region, which is in red. Click on the red line, which represents the San Andreas Fault Zone. Use the information that comes up on the screen (after you clicked the red line) to answer the questions that follow about the San Andreas Fault Zone. 2. What type of fault is the San Andreas Fault Zone? A. Normal dip-slip B. Reverse dip-slip C. Right-lateral strike-slip D. Left-lateral strike-slip 3. How long is the San Andreas Fault Zone? A. 100 km long B. 800 km long C. 1000 km long D. 1200 km long 4. Which of the following are communities near the San Andreas Fault Zone? A. Parkfield and Frazier Park B. Palmdale and Wrightwood C. San Bernardino, Banning, and Indio D. All of the above 5. When was the last major rupture on the Mojave segment of the San Andreas Fault Zone? A. 1680 B. 1857 C. 1906 D. 1989 6. When was the last major rupture on the Northern segment of the San Andreas Fault Zone? A. 1680 B. 1857 C. 1906 D. 1989 7. How fast is the slip rate for the San Andreas Fault Zone A. 20 to 35 mm per year B. 40 to 45 mm per year C. 20 to 35 meters per year D. 40 to 45 meters per year 8. How long is the average interval between earthquake ruptures on the Mojave segment? A. 20 years B. 60 years C. 140 years D. 300 years 9. How long is the average interval between earthquake ruptures on the Parkfield segment? A. 20 years B. 60 years C. 140 years D. 300 years 10. What are the probable magnitudes for earthquakes on the San Andreas Fault Zone? A. 2.8 – 5.7 B. 5.7 – 6.8 C. 6.8 – 8.0 D. 8.0 – 9.5 For fun, see if you can find the two main faults that you determined are near Chaffey College, or one of the faults near your home. You can click on them if you want more information about them, but this is not required.

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