Download Sunspot Index and Long-term Solar Observations

Sunspot Index and Long-term Solar Observations
World Data Center supported by the ICSU - WDS
n◦ 2
2017
Provisional international and normalized hemispheric daily sunspot numbers for February 2017
Computed at the Royal Observatory of Belgium using observations from an international network
with the Specola Solare Ticinese Locarno as reference station.
Date
R’I
R’N
R’S
1
2
3
4
5
47
47
39
17
13
35
47
39
17
13
12
0
0
0
0
6
7
8
9
10
13
13
11
20
24
13
13
11
20
24
0
0
0
0
0
11
12
13
14
15
22
20
19
16
24
22
20
19
16
24
0
0
0
0
0
16
17
18
19
20
19
14
13
25
32
19
14
13
13
27
0
0
0
12
5
21
22
23
24
25
26
29
24
27
32
26
29
24
18
18
0
0
0
9
14
26
27
28
38
48
59
26
43
59
12
5
0
26.1
74
23.6
61
2.5
61
Monthly mean
Cooperating stations
1
Predictions of the monthly smoothed Sunspot Number
using the last provisional value, calculated for August 2016: 36.0 (± 5%)
2016 Sep
Oct
Nov
Dec
2017 Jan
Feb
SM
CM
33
31
31
29
28
26
35
36
37
37
36
35
2017 Mar
Apr
May
Jun
Jul
Aug
SM
CM
25
24
24
23
22
21
34
32
31
31
32
33
2017 Sep
Oct
Nov
Dec
2018 Jan
Feb
SM
CM
20
19
19
18
16
15
34
33
31
30
29
28
SM : SIDC classical method : based on an interpolation of Waldmeier’s standard curves. The estimated error
ranges from 7% (first month) to 35% (last month)
CM : Combined method : the combined method is a regression technique coupling a dynamo–based estimator with
Waldmeier’s method of standard curves, designed by K. Denkmayr.
Ref.: K. Denkmayr, P. Cugnon, 1997 : “About Sunspot Number Medium-Term Predictions”, in “Solar-Terrestrial
Prediction Workshop V”, eds. G.Heckman et al., Hiraiso Solar Terrestrial Research Center, Japan, 103.
Brussels, March 1, 2017 10:23 UT
Reproduction permitted if source mentioned.
Editor: Frédéric Clette
3, avenue Circulaire, B1180 Bruxelles, Belgium
Fax: ../32/(0)2/374.98.22 Tel: ../32/(0)2/373.02.33 Email: [email protected]
Web: http://sidc.oma.be/silso
FTP anonymous : omaftp.oma.be, directory: dist/astro/sidcdata
2
Summary of the URSIGRAMs from S.I.D.C.
Date
Ri
PPSI
600
2800
COS
SFI
XI
Ak
31
35
12
-
76
////
0
0/0
27
1
2
3
4
5
6
7
8
9
10
47
47
39
17
13
13
13
11
20
24
22
16
5
2
1
0
1
2
12
17
-
76
75
75
74
73
73
72
73
73
74
////
////
////
////
////
////
////
////
////
////
0
0
0
0
0
0
0
0
1
0
0/0
0/0
0/0
0/0
0/0
0/0
0/0
0/0
0/0
0/0
32
27
22
12
18
15
10
4
8
8
11
12
13
14
15
16
17
18
19
20
22
20
19
16
24
19
14
13
25
32
13
11
6
4
1
2
3
3
1
4
-
76
76
75
75
75
74
75
77
78
81
////
////
////
////
////
////
////
////
////
////
0
0
0
0
0
0
0
0
0
1
0/0
0/0
0/0
0/0
0/0
0/0
0/0
0/0
0/0
0/0
5
4
8
1
2
8
22
20
14
11
21
22
23
24
25
26
27
28
26
29
24
27
32
38
48
59
8
15
15
13
12
19
22
21
-
83
83
83
82
80
79
82
82
////
////
////
////
////
////
////
////
3
11
4
2
0
1
2
3
0/0
0/0
0/0
0/0
0/0
0/0
0/0
0/0
5
10
15
20
8
2
11
10
Ri : provisional international sunspot numbers from the S.I.D.C.
PPSI : prompt photometric sunspot index from the S.I.D.C. in 10−5 w/m2 : the quantity to be subtracted from the mean
solar constant to account for the sunspot contribution.
600 : 600 Mhz solar flux from the station at Humain (Belgium).
2800 : 2800 Mhz solar flux from Ottawa (origin : Ursigrams - UGEOI). The 10.7cm Flux data are a service of the National
Research Council of Canada.
COS : thousands of the cosmic ray counts (origin : Ursigrams - UCOSE Terre Adélie).
SFI : Solar Flare Index from the S.I.D.C. (origin: Ursigrams - UGEOR, evaluation : 1 x Sn+10 x "1"+100 x ">1".
XI : X-flares index from the Ursigrams (M-flares/X-flares) (origin: Ursigrams - UGEOR, UGEOI).
Ak : geomagnetic index from Wingst, Germany (origin: Ursigrams).
3
SOLAR PHYSICS DEPARTMENT
UCCLE DAILY PROVISIONAL RELATIVE SUNSPOT NUMBERS FOR FEBRUARY 2017
DATE
1
2
3
6
13
14
15
16
18
19
23
24
25
27
28
UT
1450
1015
1310
1555
1010
900
1030
1000
1000
940
1315
1205
825
815
840
NUMBER NUMBER
OF
OF
GROUPS SPOTS
2
3
2
0
1
1
1
1
1
2
1
2
2
2
3
4
10
7
0
3
1
1
2
1
5
8
6
6
6
9
RELATIVE SUNSPOT NUMBERS
TOTAL NORTH SOUTH CENTRAL
24
40
27
0
13
11
11
12
11
25
18
26
26
26
39
24
40
27
0
13
11
11
12
11
12
18
15
12
26
39
0
0
0
0
0
0
0
0
0
13
0
11
14
0
0
13
0
0
0
0
0
0
0
11
12
0
26
12
15
12
PPSI QUAL OBS
10-5
WM-2
21.3
19.6
1.2
0.0
4.5
0.2
0.1
0.2
0.3
0.4
4.4
5.4
7.0
21.9
5.9
2
3
4
2
2
2
2
3
3
3
2
4
2
2
2
OL
OL
OL
BB
BB
BB
BB
AE
LL
OL
OB
OL
FC
FC
BB
The relative mean sunspot number is 20.6.
______________________
NORMALISED UCCLE OBSERVATIONAL SUNSPOT NUMBERS U’=K’U FOR FEBRUARY 2017
K’= 1.125 (*)
1
27
7
2
45
8
3
30
9
4 ***
10
5 ***
11
6
0
12
The normalised
***
13
15
19
28
25
29
***
14
12
20 ***
26 ***
***
15
12
21 ***
27
29
***
16
14
22 ***
28
44
***
17 ***
23
20
***
18
12
24
29
relative monthly mean sunspot number is
23.
(*) K’ is the mean of the monthly K’ for the last five years.
______________________
The Sun has been observed 15 days on 28 possible.
4