Daily Sunspot Evaluation
Observation Sheet Thursday, 7 March 2002
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 9
- Number of spots (f)
- 63
- Relative number (R)
- 153
- Observer
- ZFB
- Reading
- all checks consistent
- File
- 20020307.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 8 | 18 | 73W | 13 | 75W | ~13 | |
| 2 | DSO – 7 | 6 | 63W | 3 | 65W | ~6 | |
| 3 | HS – 1 | 17 | 41W | 341 | 43W | ~1 | |
| 4 | HS – 1 | 8 | 18E | 282 | 16E | ~1 | |
| 5 | ? – 1 | 18 | 78E | 222 | 76E | 2 | |
| 6 | EAO – 24 | -5 | 14W | 314 | 16W | 12 | |
| 7 | CSO – 11 | -23 | 14E | 286 | 12E | 7.5 | |
| 8 | HA – 7 | -11 | 15E | 285 | 13E | 3 | |
| 9 | HS – 3 | -4 | 30E | 270 | 28E | 2.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.