Daily Sunspot Evaluation
Observation Sheet Friday, 4 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)
- 4
- Number of spots (f)
- 29
- Relative number (R)
- 69
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720204.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | -6 | 65E | 194 | |||
| 2 | C – 9 | -12 | 50W | 309 | |||
| 3 | D – 11 | 9 | 51W | 310 | |||
| 4 | D – 7 | 0 | 17W | 276 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.