Daily Sunspot Evaluation
Observation Sheet Friday, 4 October 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)
- 6
- Number of spots (f)
- 22
- Relative number (R)
- 82
- Observer
- FA
- Reading
- all checks consistent
- File
- 19741004.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 10 | 86E | 290 | 83E | ||
| 2 | A – 2 | 5 | 72E | 304 | 63E | ||
| 3 | A – 4 | -20 | 61E | 315 | 58E | ||
| 4 | D – 8 | -5 | 02W | 18 | 05W | ||
| 5 | A – 3 | -12 | 41W | 54 | 44W | ||
| 6 | J – 4 | 10 | 06W | 22 | 09W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.