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TABLE OF CONTENTS <br />North Fork Valley Seismic Network - Second Quarter 2008 .....................................................................1 <br />Summary ..............................................................................................................................1 <br />Introduction ..........................................................................................................................1 <br />Network Operations .............................................................................................................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 ................................................................................................................5 <br />References ............................................................................................................................5 <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 />I Seismic Station Locations, Permit Area, and Mine Location Map <br />2 Relocated Seismicity, I April to 30 June 2008 <br />UM W:VC_WCFWROJECTS\WEST ELK-MTN COAL\2008 Q2\Q2_2008_MCC.DOC\25-AUG-08\\OAK i