Earth Science Sunspot Lab

 

 

The table at the bottom of the page shows the number of sunspots from the year 1925 to 2000. Using the graph paper provided, plot the sunspot numbers on the y-axis and the years on the x-axis. Try using the entire sheet of graph paper. (You can use Excel in place of graph paper). Make sure you label all parts of your graph (title, x & y-axis).

 

1. On your graph, identify all of the peak years. Calculate the average number of years between peak cycles. This can be done by counting the total number of years and dividing it by the number of peaks.

 

2. Repeat the same process for the sunspot minimum.

 

3. When was the most recent maximum year of sunspots? When would you expect the next maximum sunspot year to occur?

 

4. From your data table and graph, find the first maximum sunspot year (clue-1928). In what year prior to 1928 was there a maximum sunspot?

 

 

Year

Sunspot

Year

Sunspot

Year

Sunspot

Year

Sunspot

1925

44

1944

33

1963

10

1982

114

1926

64

1945

93

1964

15

1983

89

1927

69

1946

152

1965

47

1984

56

1928

78

1947

136

1966

86

1985

31

1929

65

1948

135

1967

98

1986

5

1930

36

1949

84

1968

105

1987

12

1931

21

1950

69

1969

107

1988

22

1932

11

1951

32

1970

65

1989

45

1933

6

1952

14

1971

69

1990

77

1934

9

1953

4

1972

57

1991

89

1935

36

1954

38

1973

42

1992

75

1936

80

1955

142

1974

38

1993

52

1937

114

1956

190

1975

16

1994

40

1938

110

1957

185

1976

18

1995

26

1939

89

1958

159

1977

27

1996

11

1940

68

1959

11

1978

87

1997

18

1941

48

1960

54

1979

146

1998

44

1942

16

1961

38

1980

149

1999

72

1943

11

1962

28

1981

125

2000

81