TY - RPRT TI - Boundary separating the seismically active reelfoot rift from the sparsely seismic Rough Creek graben, Kentucky and Illinois AU - R. L. Wheeler PY - 1997 DO - 10.1785/gssrl.68.4.586 UR - https://pubs.usgs.gov/publication/70019841 ID - 70019841 ER -