Detecting and characterizing coal mine related seismicity in the Western U.S. using subspace methods Posted on January 1, 2015June 26, 2017 by Paul Roberson Chambers, D. J. A., K. D. Koper, K. L. Pankow, and M. K. McCarter (2015). Detecting and characterizing coal mine related seismicity in the Western U.S. using subspace methods, Geophys. J. Intl., 203, 1388‐1399.