Pre AP Geo Sunspot Data 10000 years

Sunspot data for the past 10,000 years based on Carbon 14 isotopes.  A positive number correlates with more sunspots.

 

Years before the present

Variations in Sunspots from the norm

Major Event

0

0

500

-3

1,000

-5

1,500

-5

2,000

-3

2,500

-2

3,000

0

3,500

-2

4,000

-3

4,500

-1

5,000

0

5,500

+2

6,000

0

6,500

-2

7,000

+5

7,500

+4

8,000

-4

8,500

-7

9,000

-4

9,500

0

10,000

-2

 

Source; United States Geological Survey USGS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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