Daily Sunspot Evaluation
Observation Sheet Friday, 11 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)
- 10
- Number of spots (f)
- 73
- Relative number (R)
- 173
- Observer
- FA
- Reading
- all checks consistent
- File
- 19700911.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 4 | 4 | 13E | 150 | |||
| 2 | C – 10 | -10 | 52E | 111 | |||
| 3 | J – 1 | -11 | 63E | 100 | |||
| 4 | B – 3 | -20 | 20E | 143 | |||
| 5 | C – 15 | -17 | 13E | 150 | |||
| 6 | C – 17 | -14 | 28W | 191 | |||
| 7 | B – 6 | -7 | 34W | 197 | |||
| 8 | J – 1 | 10 | 31W | 194 | |||
| 9 | ? – 7 | 15 | 84W | 247 | |||
| 10 | H – 9 | 20 | 39W | 202 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.