Daily Sunspot Evaluation
Observation Sheet Wednesday, 9 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)
- 15
- Number of spots (f)
- 104
- Relative number (R)
- 254
- Observer
- MA
- Reading
- all checks consistent
- File
- 19700909.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 23 | 0 | 190 | |||
| 2 | G – 10 | 5 | 41E | 149 | |||
| 3 | ? – 3 | -10 | 78E | 112 | |||
| 4 | A – 2 | -8 | 47E | 143 | |||
| 5 | G – 13 | -17 | 39E | 151 | |||
| 6 | B – 18 | -12 | 04E | 186 | |||
| 7 | J – 1 | -13 | 05W | 195 | |||
| 8 | A – 6 | -5 | 06W | 196 | |||
| 9 | H – 32 | 16 | 53W | 243 | |||
| 10 | C – 7 | 18 | 72W | 262 | |||
| 11 | J – 2 | 20 | 47W | 237 | |||
| 12 | J – 2 | 23 | 84W | 274 | |||
| 13 | J – 1 | 10 | 04W | 194 | |||
| 14 | G – 4 | 20 | 15W | 205 | |||
| 15 | A – 1 | 23 | 17W | 207 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.