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Unformatted text preview: Geol 101 Geologic Deformation, Faults, and Earthquakes 18/10/2007 12:41:00 Earthquake Magnitude Richter Scale (magnitudes)-M o Logarithmic Scale of 1 to 9 An increase of 1 represents and earthquake that is 10 time stronger o ~30 times as much energy released! Modified Mercalli Intensity Scale o From 1 to 12 o 1 is not noticed 12 is total destruction o Observation of buildings Correctly id the kinds of seismic waves marked A,B, and C on the seismogram below? First = primary, second = secondary, third = surface The block diagram below illustrates a fault. Determine which side of the block is the hanging wall. B is the hanging wall What kind of fault is illustrated below? Normal What kind of fault is illustrated below? A=older rocks, b= younger rocks Answer = Reverse The Nuclear bomb dropped in 1945 on Hiroshima was equal to an earthquake of 5.3 M>6 are common M>7 Earthquake Frequency World Distribution of Earthquakes Circum-Pacific seismicbelt Very active area...
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- Fall '08