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<br />TABLE OF CONTENTS <br /> <br />North Fork Valley Seismic Network • Third Quarter 2007 .........................................................................1 <br />Summary ..............................................................................................................................1 <br />Introduction .......................................................................................................................... l <br />Network Onerations .............................................................................................................1 <br />Data Processing ...................................................................................................................2 <br />Identification of Events ............................................................................................2 <br />Location Methodology .............................................................................................3 <br />Magnitude Estimation ..............................................................................................3 <br />Results ............................................................ ......................................................................4 <br />Seismic Event Locations ..................... ......................................................................4 <br />Seismic Event Magnitudes .................. ......................................................................4 <br />Recorded Peak Ground Accelerations . ......................................................................4 <br />Acknowledgments .......................................... ......................................................................4 <br />References ...................................................... ...................................................................... S <br />Tables <br />1 Seismograph Stations of the North Fork Valley Seismic Network <br />2 Velocity Model Used in Locating Earthquakes <br />3 Event Locations and Maximum Recorded PGAs <br />Figures <br />1 Seismic Station Locations, Permit Area, and Mine Location Map <br />2 Relocated Seismicity, 1 July to 30 September 2007 <br />IU 1; is W:1X WCFSIPROJECTSIWEST ELK-MTN COAL12007 Q=1 2007_MCC_FINAL.DOC%29-JANABVWAK i