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seen from SOHO (Solar and Heliospheric Obser- vatory). ... vided by MDI on SOHO. .... was made in the neighborhood of the photosphere, then both methods he ...
                      

            

   

              

    

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Correlation coefficient

Si II 0.6 C IV 0.4 Ne VIII 0.2

0.0 0

2

4

6

8

10 12 Z (Mm)

14

16

18

20

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Square root of radiance (arbitrary unit)

60 C IV

Si II

50

40

30

20

10 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 |Bz|/10G at 1.4 Mm |Bz|/10G at 2.1 Mm

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Y (second of arc)

250 200 150 100 50 0 0

100

A 1.4 Mm C IV

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-10G

200 300 X (second of arc)

0G

400

10G

500

20G

Y (second of arc)

250 200 150 100 50 0 0

100

B 2.1 Mm Si II

200 300 X (second of arc)

400

500

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