Laserfiche WebLink
<br />TABLE OF CONTENTS <br />North Fork Valley Seismic Network - First Quarter 2008 ..........................................................................1 <br />Summary ...................................................................... ........................................................1 <br />Introduction .................................................................. ........................................................ I <br />Network Operations ..................................................... ........................................................1 <br />Data Processing ............................................................ ........................................................2 <br />Identification of Events .................................... ........................................................2 <br />Location Methodology ..................................... ........................................................3 <br />Magnitude Estimation ...................................... ........................................................4 <br />Results .......................................................................... ........................................................4 <br />Mining Progress ............................................... ........................................................4 <br />Seismic Event Locations .................................. ........................................................4 <br />Seismic Event Magnitudes ........... .................... ..........._............................................4 <br />Recorded Peak Ground Accelerations ............. ........................................................5 <br />Acknowledgments ........................................................ ........................................................5 <br />References .................................................................... ........_...............................................6 <br />is <br />• <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 January to 31 March 2008 <br />3 PGA Values for Q1 2008 Shown With McGarr and Fletcher (2005) Attenuation <br />Relationship <br />UM W:\x_wds\PROJECTS\North Fork-Bowie\Quarterly reports\2008 Q1\Q1_2008_BRL_fina1.doc\0AK i