Daily Sunspot Evaluation
Observation Sheet Tuesday, 11 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)
- 5
- Number of spots (f)
- 30
- Relative number (R)
- 80
- Observer
- ED
- Reading
- all checks consistent
- File
- 19720711.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | -12 | 36E | 295 | |||
| 2 | C – 15 | -10 | 23W | 354 | |||
| 3 | A – 1 | -3 | 56W | 27 | |||
| 4 | H – 12 | 8 | 47W | 18 | |||
| 5 | A – 1 | 11 | 34W | 5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.