Daily Sunspot Evaluation
Observation Sheet Wednesday, 30 September 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)
- 14
- Number of spots (f)
- 90
- Relative number (R)
- 230
- Observer
- HM
- Reading
- all checks consistent
- File
- 19810930.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DKI – 13 | 8 | 31W | 190 | 34W | 10 | |
| 2 | DAI – 8 | 7 | 02E | 157 | 01W | 9 | |
| 3 | DAO – 3 | 17 | 17E | 142 | 14E | 7 | |
| 4 | AXX – 1 | 10 | 20E | 139 | 17E | - | |
| 5 | DAO – 17 | 15 | 28E | 131 | 25E | 6 | |
| 6 | HAX – 1 | -8 | 69W | 228 | 72W | 2 | |
| 7 | HSX – 1 | -9 | 40W | 199 | 43W | - | |
| 8 | BXI – 16 | -7 | 32W | 191 | 35W | 7 | |
| 9 | HAX – 1 | -14 | 26W | 185 | 29W | 15 | |
| 10 | AXX – 3 | -14 | 17W | 176 | 20W | - | |
| 11 | AXX – 1 | -14 | 09W | 168 | 12W | - | |
| 12 | HAX – 9 | -7 | 03E | 156 | 00 | 4 | |
| 13 | HAX – 4 | -17 | 35E | 124 | 32E | 5 | |
| 14 | DAI – 12 | -18 | 56E | 103 | 53E | 13 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.