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North Fork Valley Seismic Network - Fourth Quarter 2008
<br />As can be noted in Figure 3, the typical scatter seen in ground motion data is exhibited by the
<br />NFVSN data. The McGarr and Fletcher (2005) curves lie above the central tendency of the data
<br />and in particular, the curves are very conservative at distances less than 1 km. We are currently
<br />developing a model that fits the North Fork Valley data.
<br />ACKNOWLEDGMENTS
<br />The NFVSN data analysis and evaluation are jointly supported by MCC and BRL. Our thanks to
<br />Jim Abshire, BRL Project Manager and Wendell Koontz, MCC 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 />C
<br />Koontz, W., 2007, Memorandum on the West Elk Mine :B Seam Bounce on November 17, 2007,
<br />2 1). •
<br />McGarr, A. and J.B. Fletcher, 2005, Development of Ground-Motion Prediction Equations
<br />Relevant to Shallow Mining-Induced Seismicity in the Train Mountain Area, Emery
<br />County, Utah, Bulletin of the Seismological Society of America, v. 95, p 31-47.
<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 />Wolny, D., 2007, personal communication on magnitude uncertainties.
<br />Wolny, D., 2008, written communications on magnitudes for third quarter 2008.
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