Daily Sunspot Evaluation
Observation Sheet Thursday, 31 August 1972
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)
- 68
- Relative number (R)
- 178
- Observer
- ED
- Reading
- all checks consistent
- File
- 19720831.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 15 | 13 | 07E | 12 | |||
| 2 | E – 23 | 17 | 35E | 344 | |||
| 3 | H – 3 | 11 | 52E | 324 | |||
| 4 | A – 3 | -25 | 45E | 334 | |||
| 5 | B – 4 | -4 | 04E | 15 | |||
| 6 | A – 1 | 6 | 00 | 19 | |||
| 7 | C – 3 | -6 | 16W | 35 | |||
| 8 | A – 3 | -18 | 44W | 63 | |||
| 9 | H – 2 | -14 | 61W | 80 | |||
| 10 | D – 9 | -7 | 67W | 86 | |||
| 11 | A – 2 | 17 | 63W | 82 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.