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Earthquake Measurement:     more books (100)

Preliminary in-situ measurements of an-elastic absorption in soils using a proto-type earthquake simulator, (California. Univ) by Roger D Borcherdt, 1971 Evaluation of a gravimetric technique as an earthquake precursor technique along the San Jacinto and San Andreas fault zones: Fourth semiannual technical report by John D Fett, 1979 Monitoring electromagnetic signals and electrical properties prior to earthquakes in California: Collaborative research with the Universities of California ... and Riverside and Stanford University by A. C Fraser-Smith, 2000 Response of U.S. Geological Survey creepmeters in central California to the October 18, 1989 Loma Prieta earthquake (SuDoc I 19.76:95-830) by Katherine S. Breckenridge, 1995 An analysis of the dynamic characteristics of a suspension bridge by ambient vibration measurements, (EERL) by A. M Abdel-Ghaffar, 1977 Empirical laws of order among rivers, faults and earthquakes (Open-file report / United States Department of the Interior, Geological Survey) by Herbert R Shaw, 1984 Measurements and Theoretical Models of the Earth's Electric Field Variations Related to Earthquakes by P. and Kulhanek, O. Varotsos, 1993-01-01 Effect of the 2004 'Boxing Day' tsunami on water properties and currents in the Bay of Bengal.(Report): An article from: American Journal of Environmental Sciences by Naveendra Reddy, Than Aung, et all 2009-05-01 Measurement of structural response characteristics of full-scale buildings: Selection of structures (Open-file report) by Richard D Marshall, 1993 Strong-motion data from the Whittier Narrows aftershock of October 4, 1987 (Open-file report / U.S. Geological Survey) by E. C Etheredge, 1988 Earthquake-induced dynamic response of bridges and bridge measurements: 9 reports prepared for the 54th annual meeting of the Transportation Research Board (Transportation research record) by National Research Council (U.S.), 1976 Sources of increased streamflow, Loma Prietad Earthquake, 1989: Draft final report by Robert Curry, 1991 Earthquake hazards determinations based on tectonic stress measurements: Semi-annual technical report #2, August 5, 1978 - January 5, 1979 by Charles B Archambeau, 1979 On the measurement of movements of the earth,: With reference to proposed earthquake-observations on Ben Nevis; by James Alfred Ewing, 1885

lists with details

81. Int4
    Similar pages Plate Tectonics Earthquakes (4)Plate Tectonics - Earthquakes (4) Diverging,Converging, and Transform Boundaries.  
    http://inst.santafe.cc.fl.us/~jklein/html/int4.htm
    
    Extractions: BACK NEXT GEOLOGY INDEX STUDY QUESTIONS Earthquake Measurement Earthquake measurement is not a simple problem. It is hampered by many things. Few people are capable of observing carefully what is happening around them when they are experiencing an earthquake. Moreover, equipment and structures often fail during severe earthquakes. Also, most quakes only last seconds or at most, minutes. Lastly, effects of the same event vary widely from location to location. Therefore it is difficult to coherently and accurately describe what happens during an earthquake based on eyewitness accounts. To measure earthquakes we use two different scales. One measures the energy of the waves, the other the resulting amount of damage The Richter Scale The first, the Richter scale , is an absolute scale that measures the amount of ground movement and the energy released by an earthquake, its magnitude . An earthquake of magnitude 1 releases approximately as much energy as that generated by the explosion of one pound of TNT. Each number on the Richter scale represents a ten-fold increase in ground motion and an associated energy release of approximately 30 times that of the previous number. This means that an earthquake of magnitude 7 will be nearly 1,000 times more powerful than a magnitude 5 event. Earthquakes of magnitude 6 or greater are considered severe, and represent potentially devastating events. Unfortunately, they are not all that rare. Although the Richter scale gives a fairly accurate measurement of the amount of energy released, it does not give any information as to what happens to people and structures. For that, we use the Mercalli scale.

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