Daily Sunspot Evaluation
Observation Sheet Thursday, 25 June 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)
- 96
- Relative number (R)
- 176
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810625.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DAI – 9 | 16 | 44W | 46 | 47W | 5.5 | |
| 2 | ERC – 45 | 14 | 05E | 357 | 02E | 10E | |
| 3 | DAO – 14 | 19 | 62E | 300 | 59E | 12 | |
| 4 | AXX – 2 | -13 | 12W | 14 | 15W | 1 | |
| 5 | BXI – 7 | -21 | 05W | 7 | 08W | 4 | |
| 6 | BRO – 5 | -9 | 23E | 339 | 20E | 2 | |
| 7 | DAC – 13 | -7 | 30E | 332 | 27E | 4.5E | |
| 8 | ? – 1 | -15 | 79E | 283 | 76E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.