Daily Sunspot Evaluation
Observation Sheet Wednesday, 8 April 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)
- 8
- Number of spots (f)
- 94
- Relative number (R)
- 174
- Observer
- GT
- Reading
- all checks consistent
- File
- 19810408.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HSX – 2 | 18 | 34W | 346 | 36W | 5 | |
| 2 | DAC – 20 | 5 | 23W | 335 | 25W | 10.5 | |
| 3 | HAX – 1 | 9 | 03W | 315 | 05W | 2 | |
| 4 | DKO – 19 | 9 | 09E | 303 | 07E | 13.5 | |
| 5 | EKC – 39 | 19 | 25E | 287 | 23E | 17.5 | |
| 6 | ? – 2 | 21 | 65E | 247 | 63E | 2 | |
| 7 | ? – 7 | 14 | 80E | 232 | 78E | 15 | |
| 8 | DAO – 4 | -6 | 53W | 5 | 55W | 6.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.