Daily Sunspot Evaluation
Observation Sheet Tuesday, 31 January 1978
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)
- 9
- Number of spots (f)
- 104
- Relative number (R)
- 194
- Observer
- GA
- Reading
- all checks consistent
- File
- 19780131.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 9 | 16 | 19E | 161 | 18E | ||
| 2 | D – 28 | 22 | 36E | 144 | 35E | ||
| 3 | A – 1 | 13 | 38E | 142 | 37E | ||
| 4 | A – 1 | 15 | 54E | 126 | 53E | ||
| 5 | C – 5 | -25 | 40E | 140 | 39E | ||
| 6 | D – 17 | -16 | 11E | 169 | 10E | ||
| 7 | E – 38 | -29 | 19E | 161 | 18E | ||
| 8 | ? – 4 | 16 | 76W | 256 | 77W | ||
| 9 | ? – 1 | 20 | 60W | 240 | 61W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.