Auxiliary material for paper 2006gl025033 Fault-perpendicular aftershock clusters following the 2003 Mw=5.0 Big Bear, California, earthquake Wu-Cheng Chi Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan Formerly at Seismological Laboratory, California Institute of Technology, Pasadena, California, USA Egill Hauksson Seismological Laboratory, California Institute of Technology, Pasadena, California, USA Chi, W.-C., and E. Hauksson (2006), Fault-perpendicular aftershock clusters following the 2003 Mw=5.0 Big Bear, California, earthquake, Geophys. Res. Lett., 33, L07301, doi:10.1029/2005gl025033. Introduction The supplementary material consists of (1) Table S1 (2005gl025033-ts01.txt): the preferred 1D velocity model for Big Bear, California region derived from this study; (2) 5 examples showing the results from moment tensor inversions of some aftershocks during the 2003 Big Bear sequence (2005gl025033-fs01 through 2005gl025033-fs05.eps.eps); and (3) results from first motion inversions of 2 aftershocks (2005gl025033-fs06.eps and 2005gl025033-fs07.eps). Overall these results are well-constrained.