Daily Sunspot Evaluation
Observation Sheet Tuesday, 4 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)
- 9
- Number of spots (f)
- 63
- Relative number (R)
- 153
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19810804.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DKC – 11 | 24 | 56N | 248 | 59W | 10 | |
| 2 | DAC – 11 | 20 | 29N | 219 | 30W | 9 | |
| 3 | CAO – 16 | 16 | 24N | 216 | 27W | 8 | |
| 4 | HTX – 1 | 10 | 66E | 126 | 63E | 3 | |
| 5 | ? – 1 | -2 | 84N | 236 | 87W | - | |
| 6 | AXX – 4 | -5 | 59N | 251 | 62W | 3 | |
| 7 | CAI – 9 | -8 | 49N | 241 | 52W | 9.5 | |
| 8 | AXX – 2 | -25 | 48E | 144 | 45E | 3 | |
| 9 | EKC – 8 | -8 | 77E | 115 | 74E | 14 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.