Daily Sunspot Evaluation
Observation Sheet Wednesday, 31 January 1968
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)
- 11
- Number of spots (f)
- 145
- Relative number (R)
- 255
- Observer
- SB
- Reading
- counts consistent, some coordinates doubtful
- File
- 19680131.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 89 | 13 | 05W | 158 | |||
| 2 | C – 19 | 22 | 27E | 126 | |||
| 3 | A – 3 | 26 | 40E | 118 ⚠ | |||
| 4 | J – 1 | 19 | 59E | 94 | |||
| 5 | G – 6 | 11 | 41E | 112 | |||
| 6 | C – 5 | 6 | 64E | 8932 ⚠ | |||
| 7 | H – 4 | -15 | 68E | 8589 ⚠ | |||
| 8 | H – 4 | -13 | 38E | 118 | |||
| 9 | J – 1 | -25 | 73E | 80 | |||
| 10 | A – 5 | -13 | 01W | 1542 ⚠ | |||
| 11 | C – 8 | -11 | 11W | 164 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.