Daily Sunspot Evaluation
Observation Sheet Thursday, 24 December 1970
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)
- 7
- Number of spots (f)
- 74
- Relative number (R)
- 144
- Observer
- HA
- Reading
- all checks consistent
- File
- 19701224.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 13 | 19 | 15E | 214 | |||
| 2 | H – 1 | 16 | 78E | 151 | |||
| 3 | D – 20 | -9 | 02E | 227 | |||
| 4 | E – 20 | 13 | 57W | 286 | |||
| 5 | G – 8 | 21 | 67W | 296 | |||
| 6 | A – 2 | 16 | 51W | 280 | |||
| 7 | H – 10 | 25 | 62W | 291 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.