Daily Sunspot Evaluation
Observation Sheet Friday, 9 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)
- 3
- Number of spots (f)
- 123
- Relative number (R)
- 153
- Observer
- MA
- Reading
- all checks consistent
- File
- 19701009.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 29 | 17 | 33E | 120 | |||
| 2 | C – 19 | -12 | 41E | 112 | |||
| 3 | E – 75 | -11 | 29W | 182 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.