<P dir=ltr align=left><STRONG> Longwall mining of coal is conducted </STRONG></P>
Longwall mining of coal is conducted in several large underground mines west of Bessemer (Fiscor, 2000). The mining-induced events from this region that are large enough to be detected by the USGS/NEIC automatic event-detection algorithm are also large enough to affect earthquake hazard assessments; they are therefore listed in earthquake catalogs of the USGS/NEIC. Catalogs of routine mining seismicity do not yet contain events from this mining region. The largest suspected mining-induced event from this region that is listed in earthquake catalogs of the USGS/NEIC for 1973 -- March 2000 had MB = 4.8; the largest mbLg recorded for a mining-induced event from this region is 4.0 (see Mining-induced events in the earthquake catalogs of the USGS/NEIC).