Name _________________________________________________ Per. __________Date______________
One Hundred Years After the 1906 Earthquake
Watch the video at: http://earthquake.usgs.gov/regional/nca/1906/shockwaves/
Answer the following questions as you watch the movie:
1. How long did the first shaking of the 1906 earthquake last?
2. What started after the shaking ended?
3. List some of the devastation that this earthquake produced that you notice from the pictures shown.
4. How many aftershocks were there on April 18, 1906?
5. How much land in Northern California was affected?
6. Where do the earliest records of earthquakes in California come from?
7. When do the next records begin?
8. What year were the first seismometers brought to the Bay area?
9. Who gave the order to begin an earthquake investigation unit?
10. How many scientists contributed to the investigation?
11. When was the report for the 1906 earthquake published, and what is it called?
12. What are shake maps?
13. What new technology is being used to map the line of a fault? How does it work?
14. Paleoseismology is the study of earthquakes _________________ instrumentation.
15. When was plate tectonic theory introduced?
16. According to the scientist, earthquakes represent an increase of plate movement from _____ inch per
year to approximately _____ miles per hour.
17. How are buildings designed to withstand earthquake shaking now?
18. What has been done for bridge columns? Why?
19. What is base isolation?
20. What is a shake table?
21. What can people do to be prepared for earthquakes?
22. According to scientists, there is a high probability that at least one major earthquake will occur in the
Bay area by __________.
THINKING QUESTIONS:
1. What do you think is the biggest improvement in response to earthquakes since the 1906 earthquake?
2. What improvements do you think still need to be made?
3. If you are an architect in San Francisco, what would you need to take into account when you design a
building? What resources or reports would you ask for from the US Geological Service?