Daily Sunspot Evaluation
Observation Sheet Wednesday, 4 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)
- 4
- Number of spots (f)
- 4
- Relative number (R)
- 44
- Observer
- FA
- Reading
- all checks consistent
- File
- 19740904.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 7 | 35E | 17 | |||
| 2 | J – 1 | -4 | 66E | 346 | |||
| 3 | A – 1 | -15 | 72E | 340 | |||
| 4 | J – 1 | -3 | 31E | 21 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.