Daily Sunspot Evaluation
Observation Sheet Saturday, 19 September 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)
- 8
- Number of spots (f)
- 70
- Relative number (R)
- 150
- Observer
- SM
- Reading
- all checks consistent
- File
- 19700919.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 16 | 22E | 36 | |||
| 2 | D – 35 | 20 | 38E | 20 | |||
| 3 | A – 4 | 5 | 28E | 30 | |||
| 4 | C – 8 | -17 | 20E | 38 | |||
| 5 | J – 1 | -22 | 30W | 88 | |||
| 6 | B – 5 | -14 | 38W | 96 | |||
| 7 | A – 2 | -11 | 62W | 120 | |||
| 8 | C – 14 | 10 | 49W | 107 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.