Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 October 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)
- 80
- Relative number (R)
- 180
- Observer
- FA
- Reading
- all checks consistent
- File
- 19701020.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 33 | 11 | 25E | 341 | |||
| 2 | J – 1 | 14 | 36E | 330 | |||
| 3 | H – 3 | 14 | 68E | 298 | |||
| 4 | ? – 1 | -6 | 88E | 278 | |||
| 5 | A – 2 | -10 | 15E | 351 | |||
| 6 | A – 2 | -20 | 31W | 37 | |||
| 7 | A – 4 | 5 | 62W | 68 | |||
| 8 | E – 26 | 9 | 28W | 34 | |||
| 9 | G – 6 | 9 | 45W | 51 | |||
| 10 | J – 2 | 17 | 26W | 32 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.