Daily Sunspot Evaluation
Observation Sheet Friday, 4 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)
- 11
- Number of spots (f)
- 115
- Relative number (R)
- 225
- Observer
- FA
- Reading
- all checks consistent
- File
- 19700904.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 51 | 18 | 13E | 243 | |||
| 2 | G – 5 | 22 | 59E | 197 | |||
| 3 | A – 3 | 11 | 11E | 245 | |||
| 4 | J – 1 | 10 | 63E | 193 | |||
| 5 | A – 6 | -5 | 06W | 262 | |||
| 6 | C – 4 | -13 | 11W | 267 | |||
| 7 | B – 2 | -6 | 14W | 270 | |||
| 8 | B – 8 | 12 | 59W | 315 | |||
| 9 | H – 5 | 21 | 19W | 275 | |||
| 10 | D – 25 | 19 | 05W | 261 | |||
| 11 | A – 5 | 21 | 10W | 266 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.