Daily Sunspot Evaluation
Observation Sheet Sunday, 18 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)
- 14
- Number of spots (f)
- 91
- Relative number (R)
- 231
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19700118.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 22 | 14 | 23E | 17 | |||
| 2 | H – 8 | -7 | 08E | 32 | |||
| 3 | H – 2 | -2 | 69E | 331 | |||
| 4 | A – 1 | -11 | 30E | 10 | |||
| 5 | A – 4 | -14 | 02W | 42 | |||
| 6 | C – 19 | -11 | 10W | 50 | |||
| 7 | A – 2 | -16 | 16W | 56 | |||
| 8 | C – 5 | -23 | 55W | 95 | |||
| 9 | B – 7 | -20 | 55W | 95 | |||
| 10 | C – 14 | -13 | 38W | 78 | |||
| 11 | G – 3 | -12 | 60W | 100 | |||
| 12 | ? – 1 | -12 | 84W | 124 | |||
| 13 | A – 2 | 18 | 54W | 94 | |||
| 14 | A – 1 | 13 | 24W | 64 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.