Daily Sunspot Evaluation
Observation Sheet Thursday, 30 September 1971
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)
- 6
- Number of spots (f)
- 46
- Relative number (R)
- 106
- Observer
- HA
- Reading
- all checks consistent
- File
- 19710930.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 11 | 11 | 58E | 76 | |||
| 2 | A – 1 | -8 | 63E | 71 | |||
| 3 | D – 26 | -6 | 16E | 118 | |||
| 4 | H – 2 | -6 | 02E | 132 | |||
| 5 | G – 5 | -15 | 57W | 191 | |||
| 6 | A – 1 | 12 | 56W | 190 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.