Reference Topics 10-3
There are many sites on earthquake readiness; one that shows recent quakes is listed here. You may be amazed that there are so many recent large quakes.
http://pubs.usgs.gov/fs/1999/fs151-99/
Earthquake Locator:
http://earthquaketrack.com/
These sites provide interesting decibel tests:
http://www.phys.unsw.edu.au/jw/hearing.html
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