Daily Sunspot Evaluation
Observation Sheet Wednesday, 7 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)
- 11
- Number of spots (f)
- 111
- Relative number (R)
- 221
- Observer
- GT
- Reading
- all checks consistent
- File
- 19811007.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKI – 20 | 13 | 49W | 116 | 52W | 12 | |
| 2 | AXX – 2 | 8 | 07W | 74 | 10W | 1 | |
| 3 | BXI – 8 | 19 | 03W | 70 | 06W | 6 | |
| 4 | HSX – 7 | 8 | 01E | 66 | 02W | 3 | |
| 5 | HAX – 1 | -14 | 79W | 146 | 82W | 2 | |
| 6 | HAX – 1 | -17 | 60W | 127 | 63W | 1 | |
| 7 | AXX – 1 | -19 | 40W | 107 | 43W | - | |
| 8 | AXX – 2 | -15 | 33W | 100 | 36W | - | |
| 9 | EAC – 29 | -10 | 26W | 93 | 29W | 12 | |
| 10 | BXI – 11 | -7 | 07W | 74 | 10W | 8 | |
| 11 | DKI – 29 | -11 | 14E | 53 | 11E | 9 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.