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American Relative Sunspot Numbers for April 2001

DayMn. Raw Ras.d.       Mn. Rak  s.d.
1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

226

206

209

174

164

153

136

149

141

150

153

132

135

118

97

66

42

54

85

123

153

149

149

153

162

161

160

143

158

131

12

9.7

8.6

6.6

5.8

8.9

7.6

6.3

6.9

8.9

8

4.7

4.4

3

4.4

5.1

2.1

2.6

2.9

5.3

9

6

7.5

6.7

8

6.8

7

6.2

6.2

5

  189

185

182

154

136

131

118

124

125

130

127

115

116

100

79

59

36

47

73

105

131

126

126

136

139

138

133

120

132

108

7.9

8

7.1

5.3

4.7

7.3

4.8

4.6

4.5

6.5

5.6

3.1

3.7

2.9

3.9

4.4

1.5

2.1

2.7

3.7

6.2

4.1

5.5

4.8

5.1

5

5.1

4.2

3.8

3.5

Means:141.1  120.6 
No. of Observations: 1214
No. of Observers: 71

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