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TABLE OF CONTENTS <br />North Fork Valley Seismic Network - Fourth Quarter 2007 ......................................................................1 <br />Summary ........................................................... <br />Introduction ....................................................... <br />Network Operations .......................................... <br />Data Processing ................................................. <br />Identification of Events .......................... <br />Location Methodology ........................... <br />Magnitude Estimation ............................ <br />R Penltc <br />Seismic Event Locations ....................... <br />Seismic Event Magnitudes .................... <br />Recorded Peak Ground Accelerations.. <br />Acknowledgments ............................................. <br />References ......................................................... <br />1 <br />..................................................... <br />.....................................................1 <br />.......................... .......................1 <br />.....................................................2 <br />........................ .........................2 <br />.........................3 <br />.....................................................4 <br />........................ .......................4 <br />......................... ........................4 <br />.....................................................4 <br />.....................................................5 <br />.....................................................6 <br />.....................................................6 <br />Tables <br />1 Seismograph Stations of the North Fork Valley Seismic Network <br />2 Velocity Model Used in Locating Seismic Events • <br />3 Event Locations and Maximum Recorded PGAs <br />Figures <br />1 Seismic Station Locations, Permit Areas, and Mine Location Map <br />2 Relocated Seismicity, 1 October to 31 December 2008 <br />3 PGA Values for Q3 2007 to Q4 2008 Shown With McGarr and Fletcher (2005) <br />Attenuation Relationships <br />• <br />UM W1x_wcfs\PR0JECTSWorth Fork-Bowie\Quarterly reports\2008 Q4\Q4_2008_BRL.doc\0AK 1