Daily Sunspot Evaluation
Observation Sheet Thursday, 6 February 1975
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)
- 2
- Number of spots (f)
- 20
- Relative number (R)
- 40
- Observer
- OG
- Reading
- all checks consistent
- File
- 19750206.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 12 | 2 | 42E | 123 | 42E | ||
| 2 | C – 8 | -14 | 08E | 157 | 08 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.