Daily Sunspot Evaluation
Observation Sheet Tuesday, 25 April 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)
- 9
- Number of spots (f)
- 34
- Relative number (R)
- 124
- Observer
- ED
- Reading
- all checks consistent
- File
- 19720425.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 22 | 23E | 250 | |||
| 2 | J – 2 | 17 | 20E | 253 | |||
| 3 | C – 7 | 3 | 39E | 234 | |||
| 4 | J – 1 | -6 | 21E | 252 | |||
| 5 | C – 7 | -14 | 00 | 273 | |||
| 6 | H – 4 | -10 | 46W | 319 | |||
| 7 | J – 4 | -4 | 50W | 323 | |||
| 8 | A – 3 | 8 | 45W | 318 | |||
| 9 | B – 5 | 9 | 29W | 302 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.