Daily Sunspot Evaluation
Observation Sheet Monday, 7 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)
- 20
- Relative number (R)
- 70
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720207.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 3 | -6 | 21E | 196 | |||
| 2 | A – 1 | -5 | 31E | 186 | |||
| 3 | D – 12 | -20 | 36W | 253 | |||
| 4 | A – 1 | -1 | 60W | 277 | |||
| 5 | B – 3 | -5 | 07W | 224 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.