Daily Sunspot Evaluation
Observation Sheet Thursday, 4 September 1975
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)
- 34
- Relative number (R)
- 74
- Observer
- GA
- Reading
- all checks consistent
- File
- 19750904.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 8 | 10 | 23E | 251 | 20E | ||
| 2 | C – 21 | 8 | 16E | 258 | 13E | ||
| 3 | A – 3 | 7 | 09E | 265 | 06E | ||
| 4 | A – 2 | 7 | 09W | 283 | 12W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.