Preliminary determination of epicenters.

1970; July 1970-1973; 1970:no.7-1971:no.9,1971:no.11-1973:no.4,1973:no.7-1973:no.10,1973:no.12-1974:no.12; 1971-1974; 1971-74; 1974-1977; 1975-1977; 1975:no.1-1976:no.7,1976:no.9-1977:no.7,1977:no.9-1977:no.12; 1978; 1975-79; 1978:no.1-1979:no.1,1979:no.3-1979:no.12; 1979 Jan-Feb 1979; 1979; 1978-1980; 1980 Oct-Dec 1980; 1980; 1980:no.2-1981:no.4,1981:no.6-1981:no.12; 1981; 1981 1981; 1982; 1982:no.4-1984:no.12; 1983-1984; 1985; 1985-1986; 1986-1991; 1991:no.1-1992:no.2; 1992-1995; 1995 1995; 1996; 1996 1996; 1997; 1997 1997; 1998 Apr, Jun-Dec 1998; 1998 no.7-12; 1998-1999 Inc.; 1999 Jan-Oct 1999; 1999 no.1-4; 1999 no.5-8; 1999 no.9-12; 2000 Oct-Dec 2000; 2000 no.1-4; 2000 no.5-7; 2000 no.8-12; 2000-2001 Inc.; 2001 no.1-4; 2001 no.5-7; 2001 no.8-11; 2001 no.12; 2002 no.1-3; 2002 no.4-6; 2002 no.7-9; 2002 no.10-12; 2003 no.1-3; 2003 no.4-6; 2003 no.7-9; 2003 no.10-12; 2004 no.1-3; 2004 no.4-6; 2004 no.7-9; 2004 no.10-12; 2005 no.1-3; 2005 no.4-6; 2005 no.7-9; 2005 no.10-12; 2006 no.1-3; 2006 no.4-6; 2006 no.7-9; 2006 no.10-12; 2007 no.1-3; 2007 no.4-6; 2007 no.7-9; 2007 no.10-12