Daily Sunspot Evaluation
Observation Sheet Friday, 25 June 1971
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)
- 39
- Relative number (R)
- 79
- Observer
- HA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19710625.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 14 | 32E | 304 | |||
| 2 | E – 16 | 14 | 42E | 284 ⚠ | |||
| 3 | B – 9 | -17 | 09E | 327 | |||
| 4 | D – 12 | -22 | 12W | 348 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.