Daily Sunspot Evaluation
Observation Sheet Wednesday, 12 July 1972
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)
- 36
- Relative number (R)
- 106
- Observer
- FA
- Reading
- all checks consistent
- File
- 19720712.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 8 | 78E | 243 | |||
| 2 | ? – 2 | -11 | 82E | 239 | |||
| 3 | J – 1 | -12 | 26E | 295 | |||
| 4 | C – 18 | -10 | 34W | 355 | |||
| 5 | A – 1 | -3 | 67W | 28 | |||
| 6 | H – 6 | 9 | 57W | 18 | |||
| 7 | J – 7 | 12 | 46W | 7 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.