Daily Sunspot Evaluation
Observation Sheet Friday, 6 September 1974
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)
- 7
- Number of spots (f)
- 13
- Relative number (R)
- 83
- Observer
- SK
- Reading
- all checks consistent
- File
- 19740906.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | -4 | 39E | 346 | |||
| 2 | A – 1 | -15 | 46E | 339 | |||
| 3 | B – 5 | -14 | 20E | 5 | |||
| 4 | J – 1 | -8 | 04E | 21 | |||
| 5 | A – 3 | 5 | 05W | 28 | |||
| 6 | A – 1 | -12 | 25W | 50 | |||
| 7 | A – 1 | 10 | 16W | 41 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.