Daily Sunspot Evaluation
Observation Sheet Tuesday, 1 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)
- 6
- Number of spots (f)
- 21
- Relative number (R)
- 81
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720201.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | -1 | 25E | 273 | |||
| 2 | A – 3 | -13 | 08W | 306 | |||
| 3 | D – 6 | -17 | 44W | 342 | |||
| 4 | A – 1 | 11 | 74W | 12 | |||
| 5 | J – 2 | 13 | 27W | 325 | |||
| 6 | B – 7 | 9 | 09W | 307 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.