Daily Sunspot Evaluation
Observation Sheet Wednesday, 23 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)
- 7
- Number of spots (f)
- 71
- Relative number (R)
- 141
- Observer
- FA
- Reading
- all checks consistent
- File
- 19720223.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 14 | -18 | 25E | 344 | |||
| 2 | J – 2 | -17 | 29W | 38 | |||
| 3 | A – 1 | -15 | 37W | 46 | |||
| 4 | J – 4 | -12 | 39W | 48 | |||
| 5 | J – 3 | -6 | 53W | 62 | |||
| 6 | ? – 2 | 5 | 83W | 92 | |||
| 7 | F – 45 | 10 | 11W | 20 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.