SciLinks

In our science text book there is a little box on the right-hand side of the page 47 is a website link that has lot's of other links to sites we could visit on the site: http://www.thetech.org/exhibits_events/online/quakes/faults/ I found some interesting facts:
Did you know?
1.The Pacific plate is moving to the northwest at a rate of about 4 inches per year.
2.Perhaps the earliest seismograph was invented in China A.D. 136 by a m an named Choko.
3.This early eastern seismoscope consisted of a copper vessel with eight dragon heads attached to it, positioned above eight frogs.
4.A well known fault is the San Andreas Fault which separates the Pacific plate from the North American plate. The Pacific plate has San Fransicso and Los Angeles on it, while the North American plate contains the rest of California and the U.S.
5.Earthquake intensities are rated with Roman numerals ranging from I (not felt) to XII (buildings nearly destroyed). This Mercalli scale is from the Loma Prieta earthquake in the Santa Cruz mountains in California.

6. The Richter magnitude scale was orginally developed by Charles Richter and Beno Gutenberg to make more quantitative measures of the relative sizes of earthquakes in southern California. Today, modified versions of the scale are used to measure earthquakes throughout the world.