Daily Sunspot Evaluation
Observation Sheet Wednesday, 24 February 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)
- 7
- Number of spots (f)
- 54
- Relative number (R)
- 124
- Observer
- FA
- Reading
- all checks consistent
- File
- 19710224.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 2 | 10 | 09E | 84 | |||
| 2 | A – 2 | -13 | 49E | 44 | |||
| 3 | C – 6 | -16 | 17E | 76 | |||
| 4 | B – 2 | -10 | 08E | 85 | |||
| 5 | E – 23 | -15 | 02W | 95 | |||
| 6 | C – 18 | -15 | 17W | 110 | |||
| 7 | J – 1 | -6 | 41W | 134 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.