Daily Sunspot Evaluation
Observation Sheet Sunday, 31 December 1967
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)
- 91
- Relative number (R)
- 201
- Observer
- LT
- Reading
- counts consistent, some coordinates doubtful
- File
- 19671231.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | -16 | 70E | 135 | |||
| 2 | A – 1 | -11 | 13E | 192 | |||
| 3 | J – 1 | -30 | 52E | 153 | |||
| 4 | D – 10 | -18 | 6E | 199 | |||
| 5 | D – 25 | -28 | 10E | 195 | |||
| 6 | A – 6 | -18 | 3E | 202 | |||
| 7 | C – 10 | -16 | 1W | 206 | |||
| 8 | H – 2 | -23 | 46W | 251 | |||
| 9 | F – 27 | -16 | 52W | 257 | |||
| 10 | C – 6 | -15 | 4W | 246 ⚠ | |||
| 11 | A – 2 | -2 | 5W | 210 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.