North Fork NOV Seismic Network - Third Quarter 2009
<br />station distance. The largest PGA recorded during the quarterly period was 0.06 g at station
<br />FGH for a ML 1.7 event at a distance of approximately 0.88 km (0.52 mi). This event occurred
<br />on 8 August 2009 11:41 GMT at the Bowie No. 2 Mine. The largest PGA recorded at the West
<br />Elk Mine was 0.002 g at station SPG resulting from the 25 September 15:88 GMT ML 2.3
<br />seismic event that occurred at a distance of approximately 5.88 km (3.65 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 (NIOSH/CDS) and Dave Wolny (Mesa State
<br />College) for their assistance in the operation and maintenance of the network. Our thanks to
<br />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., 2007, 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 />Wolny, D., 2007, personal communication on magnitude uncertainties.
<br />Wolny, D., 2008, written communications on magnitudes for third quarter, 2008.
<br />UM WAX_WUS\PROJECTS\WEST ELK-MTN COAL\2009 Q3\Q3_2009_MCC.DOC\13-NOV-09\\OAK 5
|