Daily Sunspot Evaluation
Observation Sheet Saturday, 15 August 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)
- 12
- Number of spots (f)
- 92
- Relative number (R)
- 212
- Observer
- AÖ0
- Reading
- counts consistent, some coordinates doubtful
- File
- 19810815.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HKX – 1 | 10 | 39W | 126 ⚠ | 82W | 3 | |
| 2 | HAX – 4 | 26 | 41W | 88 | 44W | 2 | |
| 3 | FKC – 15 | -9 | 73W | 120 | 76W | 21 | |
| 4 | CAZ – 7 | -20 | 63W | 110 | 66W | 35 | |
| 5 | BXI – 7 | -24 | 41W | 88 | 44W | 5 | |
| 6 | AXX – 1 | -11 | 40W | 87 | 43W | - | |
| 7 | AXX – 1 | -9 | 10W | 57 | 13W | - | |
| 8 | CAI – 9 | -20 | 24E | 23 | 21E | 6 | |
| 9 | FKC – 37 | -15 | 41E | 6 | 38E | 17 | |
| 10 | HKC – 8 | -8 | 65E | 342 | 62E | 4 | |
| 11 | HAX – 1 | -2 | 81E | 326 | 78E | ? | |
| 12 | ? – 1 | -18 | 82E | 325 | 79E | ? |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.