Salt lake city on the base map of the western united states (figure 4), draw rirele 4. so of the four stations, with each radine enm tr mpass, lc hic scale procedure: perhaps the easiest way to develop an intuitive understanding of the relationship between magnitudes is to relate them to something that you already understand. in our case, you will scale magnitudes to distances to compare how large earthquakes are. our conversion will be millimeters- 10 m for example a moment magnitude m-4 earthquake would be equal to 10 mm= you will want to convert millimeters into meterss or, better yet, kilometers xic 10,000 mm. there are 1000 mm in one m. there are 1000 m in 1 km. 1) calculate the distance for each of the carthquakes in the table above. write down the distance along with the units that you used. this gives you the distance covered if the magnitude were rolled out on the ground. 2) use the maps provided, starting at the center of campus and measuring east, find the nearest landmark to your measured distance. it can be a street intersection, building, or another city depending on your map scale. 3) now compare the difference between a mw 9.3 and 9.5 earthquake to a mw 3.0 and 5.0 earthquake. write a short paragraph explaining the size difference, given our analogy of moment magnitude to distance, and explaining how to judge the size difference between two earthquakes in your own words. as the numbers get large. therefore at the high end of the scale, the size difference between earthqulkes ul magnitude 7.8 and 7.9 may be very large. how much larger? we will explore this difference using maps to equate distances over the ground to the size differences between earthquakes. below is a list of well known earthquakes and the magnitudes determined for each. magnitude 9.5 9.3 8.1 8.0 7.8 7.3 1994 northridge, ca 2002 yearly typical annual southern california earthquake yearly typical annual south carolina earthquake location date 1960 chile 2004 6.7 hindu kush, afghanistan 6.1 5.0 sumatra 1811 new madrid, mo 1812 new madrid, mo 1906 san francisco, ca 1886 charleston, sc 3.0 hit 4