Daily Sunspot Evaluation
Observation Sheet Monday, 18 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)
- 10
- Number of spots (f)
- 130
- Relative number (R)
- 230
- Observer
- DK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19671218.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 14 | 04E | 10 | |||
| 2 | E – 11 | 23 | 39E | 335 | |||
| 3 | A – 1 | 11 | 19E | 355 | |||
| 4 | H – 1 | -21 | 62E | 312 | |||
| 5 | ? – 3 | -33 | 82W | 96 | |||
| 6 | A – 1 | 9 | 25W | 39 | |||
| 7 | D – 13 | 26 | 52W | 76 ⚠ | |||
| 8 | B – 4 | 16 | 31W | 45 | |||
| 9 | D – 16 | 21 | 21W | 38 | |||
| 10 | F – 79 | 18 | 11W | 28 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.