%A Paul Rydelek %A Selwyn Sacks %J Bulletin of the Seismological Society of America %T Comment on "Minimum Magnitude of Completeness in Earthquake Catalogs: Examples from Alaska, the Western United States, and Japan," by Stefan Wiemer and Max Wyss %X Wiemer and Wyss [2000] (WW) have analyzed earthquake data from Japan in order to determined the magnitude level (Mc) at which seismic catalogs are complete. Regional and local maps that accurately show the spatial variation of Mc are important because they provide helpful guidance in planning for the future deployment of seismic stations. This comment is intended to point out several problems with WW's method of determining Mc and to demonstrate that ignoring temporal variations in seismicity can result in erroneous completeness maps. %N 4 %P 1862-1867 %V 93 %D 2003 %I Seismological Society of America %R doi:10.1785/0120020035 %L epos1461