Daily Sunspot Evaluation
Observation Sheet Tuesday, 25 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)
- 15
- Relative number (R)
- 65
- Observer
- ED
- Reading
- all checks consistent
- File
- 19720725.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 3 | 6 | 13E | 136 | |||
| 2 | A – 2 | 3 | 42E | 107 | |||
| 3 | J – 1 | 4 | 30E | 119 | |||
| 4 | A – 1 | -4 | 44E | 105 | |||
| 5 | E – 8 | -16 | 62E | 87 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.