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1 <br />- , <br />_ ~~~ ~ 6 <br />,'., <br />~ Rid e 2 S ~enc-rether MEQ-80G-H <br />/ ~~ ~ 4 P' ~ Portable <br />seismographs <br />(-I ~~ _; 1 Mark Products L-l0A vertical com- <br />- ponent geophone <br />'-~;1 i t4ark Products L-l0A horizontal <br />~,,-: ~:' component geophone <br />'~,-- '-/., ~ Conveyor 1 Teledyne RFT-3;0 strong motion <br />° ~ ~. - `.'-~++ accelerograph <br />-~_• °'~f,,'~A detailed description of the instrumentation and specifications <br />"~~<•' ;are contained in the Instrumentation Appendix. <br />__~ <br />f.~ .. <br />,Mr. Brooks operated the vS-1100 seismograph at the overhang. <br />it - <br />"'~"~~The RFT-350 accelerograph at the conveyor was cperated by Mr. <br />'" 1 ~"~ '_'..r. <br />~.-+~Hansen. The five tdEQ-800-B's were installed and ran unattended. <br />• ' ~"?::~ <br />~f Seismic records from tivo long-term monitoring programs were <br />`~ Y~ •1... ~ <br />",W :~~.-',"~;,~" .examined to determine the relative ground motion induced by <br />"~" <br />,~'-r-• S4inslow Construction Company's shooting at the Deer Creek <br />~. ''~,,,,-.~~.A <br />,,.ra r'~ <br />~: '•~~~±,~ Canyon Quarry. One of these stations, GOL, is ?art of the World <br />.~ ..*' <br />'+,~;~;;:;._,. "..'x~Wide Standard Seismograph Station Network. GOL is located in <br />a ;.; Bergen Park, Colorado, 25 km (15.6 miles) from the Deer Creek <br />'°"'"C.~Quarry. It has been operating continuously since 1963. The <br />~~'' ~. " ~ <br />"T' station consists of a three-component short period and a three- <br />.;:.,` . <br />~`""•= component long-period seismograph. The second station used in <br />~~' -1 <br />~*~„`~"~ this study, DWB, is operated by biicroGeophysics for the Denver <br />'~~~~ ~ .Water Board near Strontia Springs, Colorado, 14.7 km (9.2 <br />'a. . ~ ' -. <br />~`~`•`=`.miles) from the quarry. DWB is a high-gain, 3-component, short- <br />,.~ j ...period seismograph. However, DWu records are not continuous. <br />' '"~ <br />-.,,,~:"'~.~The first phase of recording at Strontia Springs was completed on <br />``'~. <br />! ~ July 11, 1978 and the second phase began on December 20, 1978. <br />''y~~l,~Therefore, there are no DWB records for 5 months of the study period. <br />>.~ <br />. ,... Y`'.. i. <br />~ ~~"~~~ ~.~ MICROGEOI'HYSICS <br />