Hα synoptic charts
| 1979 | |
| 1980 | download |
| 1981 | download |
| 1982 | download |
| 1983 | download |
| 1984 | download |
| 1985 | download |
| 1986 | download |
| 1987 | download |
| 1988 | download |
| 1989 | download |
| 1990 | download |
| 1991 | download |
| 1992 | download |
| 1993 | download |
| 1994 | download |
| 1995 | download |
| 1996 | download |
| 1997 | download |
| 1998 | download |
| 1999 | download |
| 2000 | download |
| 2001 | download |
| 2002 | download |
| 2003 | download |
| 2004 | download |
| 2005 | download |
| 2006 | download |
| 2007 | download |
| 2008 | download |
| 2009 | download |
| 2010 | download |
| 2011 | download |
| 2012 | download |
| 2013 | download |
| 2014 | download |
| 2015 | download |
| 2016 | download |