Daily Sunspot Evaluation
Observation Sheet Sunday, 25 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)
- 7
- Number of spots (f)
- 16
- Relative number (R)
- 86
- Observer
- HM
- Reading
- all checks consistent
- File
- 19811025.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAO – 2 | 20 | 62W | 251 | 64W | 6.5 | |
| 2 | CAO – 2 | 15 | 23E | 166 | 21E | 4.5 | |
| 3 | HKX – 1 | 14 | 68E | 121 | 66E | 2.5 | |
| 4 | DAO – 4 | -8 | 62W | 251 | 64W | 5.5 | |
| 5 | CAO – 2 | -5 | 22W | 211 | 24W | 4.5 | |
| 6 | DAC – 4 | -27 | 03E | 186 | 01E | 8 | |
| 7 | AXX – 1 | -31 | 23E | 166 | 21E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.