Daily Sunspot Evaluation
Observation Sheet Saturday, 31 October 1981
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)
- 13
- Number of spots (f)
- 79
- Relative number (R)
- 209
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19811031.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | CAO – 3 | 16 | 55W | 165 | 58W | 8 | |
| 2 | ARX – 2 | 12 | 30W | 140 | 33W | 1 | |
| 3 | DAI – 7 | 13 | 11W | 121 | 14W | 7.5 | |
| 4 | BXO – 4 | 6 | 04E | 106 | 01E | 4 | |
| 5 | AXX – 6 | 12 | 05E | 105 | 02E | 4.5 | |
| 6 | CKI – 8 | 15 | 29E | 81 | 26E | 6.5 | |
| 7 | DAO – 7 | 27 | 37E | 73 | 34E | 8 | |
| 8 | ? – 1 | -25 | 82W | 192 | 85W | ||
| 9 | AXX – 1 | -18 | 06W | 116 | 09W | ||
| 10 | BXO – 6 | -23 | 28E | 82 | 25E | 5 | |
| 11 | HAX – 2 | -8 | 43E | 67 | 40E | 2 | |
| 12 | AXX – 3 | -15 | 51E | 59 | 48E | 1.5 | |
| 13 | FXC – 29 | -14 | 60E | 50 | 57E | 15 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.