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North Fork Valley Seismic Network - First Quarter 2010
<br />on 1 January 2010 07:14 GMT at the Bowie No. 2 Mine. The largest PGA recorded at the West
<br />Elk Mine was 0.002 g at station WFW resulting from the 25 February 21:08 GMT MC 1.8
<br />seismic event that occurred at a distance of approximately 1.58 km (0.98 mi). Note distances are
<br />approximate given uncertainties in the event locations due to uncertainties in the velocity model
<br />used in the relocations.
<br />ACKNOWLEDGMENTS
<br />The NFVSN data analysis and evaluation are jointly supported by MCC and BRL. Our thanks to
<br />Wendell Koontz, MCC Project Manager, and Jim Abshire, BRL Project Manager for their
<br />support. Our appreciation to Pete Swanson NOSH/CDS) for his operation and maintenance of
<br />the network. Our thanks to Melinda Lee for her assistance in the preparation of this report.
<br />REFERENCES
<br />Banfill, R., 1995, PC-SUDS Utilities, A collection of tools for routine processing of seismic data
<br />stored in the seismic unified data system for DOS (PC-SUDS).
<br />Johnson, C.E., Bittenbinder, A., Bogaert B., Dietz L., and Kohler W., 1995, EW: A Flexible
<br />Approach to Seismic Network Processing: IRIS Newsletter, v. 14, no. 2, p. 1-4.
<br />Koontz, W., 2.007, Memorandum on the West Elk Mine B Seam Bounce on November 17, 2007,
<br />2 p.
<br />Swanson, P. and Koontz, W., 2006, Measurement and analysis of mining induced seismic
<br />ground motion in the vicinity of the West Elk Coal Mine, Somerset, CO (abstract):
<br />Seismological Research Letters, v. 77, no. 2, p. 318.
<br />Swanson, P., Stewart, C., and Koontz, W., 2007, Installation of a digital, wireless, strong-motion
<br />network for monitoring seismic activity in a western Colorado coal mining region,
<br />Proceedings of the 20th Symposium on Application of Geophysics to Engineering and
<br />Environmental Problems (SAGEEP), Environmental and Engineering Geophysical
<br />Society, p. 559-565.
<br />Wong, I.G. and McGarr, A., 1990, Implosional failure in mining-induced seismicity: A critical
<br />review, in Rockbursts and Seismicity in Mines, Proceedings of the Second International
<br />Symposium, C. Fairhurst (ed.), A.A. Balkema Publishers, p. 45-51.
<br />=i WAX_WCFS\PROJECTS\WEST ELK-MTN COAL\2010 01\01_2010_MCC.DOC\31-AUG-10\\OAK 5
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