Daily Sunspot Evaluation
Observation Sheet Wednesday, 19 August 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)
- 47
- Relative number (R)
- 147
- Observer
- MA
- Reading
- all checks consistent
- File
- 19700819.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 15 | 8 | 14E | 93 | |||
| 2 | A – 7 | 13 | 55E | 52 | |||
| 3 | ? – 1 | 5 | 81E | 26 | |||
| 4 | A – 1 | -7 | 56E | 51 | |||
| 5 | A – 1 | -19 | 75E | 32 | |||
| 6 | A – 3 | -6 | 27E | 80 | |||
| 7 | A – 3 | -10 | 09W | 116 | |||
| 8 | D – 6 | -16 | 47W | 154 | |||
| 9 | B – 5 | -14 | 56W | 163 | |||
| 10 | E – 5 | -10 | 75W | 182 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.