Daily Sunspot Evaluation
Observation Sheet Monday, 1 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)
- 6
- Number of spots (f)
- 95
- Relative number (R)
- 155
- Observer
- FA
- Reading
- all checks consistent
- File
- 19710201.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 48 | 6 | 11E | 66 | |||
| 2 | J – 2 | -7 | 65E | 12 | |||
| 3 | C – 8 | -21 | 52E | 25 | |||
| 4 | D – 22 | -13 | 23W | 100 | |||
| 5 | B – 3 | 2 | 43W | 120 | |||
| 6 | D – 12 | 8 | 15W | 92 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.