Daily Sunspot Evaluation
Observation Sheet Wednesday, 28 January 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)
- 10
- Number of spots (f)
- 120
- Relative number (R)
- 220
- Observer
- SK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19700128.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 10 | -4 | 06E | 262 | |||
| 2 | D – 15 | 12 | 45E | 223 | |||
| 3 | C – 11 | -5 | 15E | 253 | |||
| 4 | C – 15 | -8 | 10E | 258 | |||
| 5 | C – 18 | -7 | 01W | 265 ⚠ | |||
| 6 | J – 1 | -22 | 18W | 286 | |||
| 7 | A – 2 | -17 | 12W | 280 | |||
| 8 | E – 30 | -17 | 25W | 293 | |||
| 9 | D – 16 | -11 | 28W | 296 | |||
| 10 | J – 2 | -3 | 68W | 336 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.