Daily Sunspot Evaluation
Observation Sheet Friday, 25 February 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)
- 41
- Relative number (R)
- 91
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720225.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 11 | -18 | 01W | 343 | |||
| 2 | J – 2 | -17 | 56W | 38 | |||
| 3 | J – 1 | -13 | 65W | 47 | |||
| 4 | F – 26 | 9 | 41W | 23 | |||
| 5 | A – 1 | 10 | 28W | 10 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.