My halo statistics
 

Here is how many halo days and night I have had during a year and a month. All observations in Finland and abroad are counted here. I have been an active halo observer since March 1990.

 

 Summary 1984 - 2007

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total Aver.
Finland 109 173 248 248 232 226 207 181 153 121 99 61

= 2058

 
num. 17 18 20 20 19 18 18 18 18 18 18 18 = 220 = 18.3 
aver. 6.4 9.6 12.4 12.4 12.2 12.6 11.5 10.1 8.5 6.7 5.5 3.4 = 111.3 =  9.4
Abroad 73 54 3 - 10 2 - - - - 3 34 = 179  

Total

182 227 251 248 242 228 207 181 153 121 102 95 = 2237  
                             

 Halos per year statistics

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total Cum.
2007 11 14 8 7 10 3 6 12 ...       = 71  
 2007         1 6

 

            = 1 ^
2006 5 7

16

8 10 13 19 8 10 5 6 2 = 109 2165
2005

4

5

10

11 5 7 6 6 5 2 1 3 = 65 2056
2004 9 9 8 9 10 14 9 6 8 2 6 1

= 91

1991
 2004          

2 5

            = 2 ^
2003 9 9 9 11 10 5 3 4 8 8 3 2

= 81

1898
2002 14 4 8 14 17 14 9 8 8 10 13 5

= 124

1817
2001 7 18 19 14 13 11 11 13 11 3 6 10 = 136 1693
2000 6 8 12 13 16 14 13 13 6 3 0 2 = 106 1557
1999 - 2 13 20 21 16 13 15 15 6 4 5 = 130 1451

1999

22 4 18 4                     = 40 ^
1998 9 17 28 24 13 15 16 10 13 10 5 - = 160 1281

1998

                    3 4 26 4 = 29 ^
1997 - - 19 18 19 18 18 17 12 12 4 5 = 142 1092

1997

34 3 36 3 3 3                   = 73 ^
1996 1 25 17 17 18 17 20 18 11 9 6 1 = 160 877

1996

17 2

                    8 3 = 25 ^
1995 13 15 19 26 12 20 15 16 17 14 24 12 = 203 692
1995         9 1               = 9 ^
1994 8 12 8 14 18 14 14 9 10 13 13 4 = 137 480
1993 4 9 10 10 11 13 8 10 7 10 1 0 = 93 343
1992 1 5 9 8 9 11 10 7 1 7 4 0 = 72 250
1991 5 9 11 18 11 18 14 5 5 4 2 2 = 104 178
1990     11 8 8 3 3 3 1 2 0 5 = 44 74
1988       8 1               = 9 30
1987 1             1         = 2 21
1986   3 1                 1 = 5 19
1985 2 2 1 1         5 1 1   = 13 14
1984                       1 = 1 1

 

My records
category record when
Best year in total 215 1997 (142 in Finland, 73 abroad)
Best year in Finland 203 (plus 9 abroad) 1995 
Best month of all time 36 February 1997 (Oymyakon, Siberia)
Best month in Finland 28 March 1998
Best January in Finland 14 2002
Best February in Finland 25 1996
Best March in Finland 28 1998
Best April in Finland 26 1995
Best May in Finland 21 1999
Best June in Finland 20 1995
Best July in Finland 20 1996
Best August in Finland 18 1996
Best September in Finland 17 1995
Best October in Finland 14 1995
Best November in Finland 24 1995
Best December in Finland 12 1995
Best theoretical year in Finland 239 Compination of all best months in Finland

 

Observations in abroad (blue text in table)
1) Trip to Fairbanks, Alaska in May 1995.
2) Trip to Fairbanks, Alaska in January 1996.
3) Oymyakon expedition 13. Dec 1996 - 3. March 1997 to East-Siberia.
4) South Pole expedition 26. Nov 1998 - 24. Feb 1999.

5) Bad Honnef in Germany. Atmoshperic Optics meeting. 13. - 18. June 2004.

6) Trip to Tallinn, Estonia in May 2007..
 

How observations has been counted?
All observations in one observation day around sun are counted as one observation. All observations in one observation night around moon are counted as one observation. Halos around artificial light source or ground halos are not counted. So, it is possible to get three observations in 24 hours when you have halos around moon in early morning, around sun during the day and again around moon in the next evening, since observation night changes at noon.

 

Observation day and night?
Observation day change at 0.00 (midnight) and observation night change at 12.00 (noon). Because this, in summer or winter in northern Finland (and elsewhere above artic circle or below antarctic circle) it is possible to get two observations out of the same display if display continue over midnight or noon.

 

 
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© Jarmo Moilanen 2005