Daily Sunspot Evaluation
Observation Sheet Wednesday, 25 March 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)
- 10
- Number of spots (f)
- 89
- Relative number (R)
- 189
- Observer
- GT
- Reading
- all checks consistent
- File
- 19810325.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 10 | 9 | 75W | 212 | 78W | 12 | |
| 2 | AXX – 2 | 15 | 52W | 190 | 50W | 1.5 | |
| 3 | BXO – 11 | 21 | 35W | 172 | 38W | 7 | |
| 4 | AXX – 1 | 17 | 31W | 168 | 34W | 0.3 | |
| 5 | BXI – 6 | 10 | 24W | 161 | 27W | 3 | |
| 6 | FKS – 42 | 14 | 08W | 145 | 11W | 12.5 | |
| 7 | HAX – 2 | 20 | 07E | 130 | 04E | 1.5 | |
| 8 | DAI – 7 | 22 | 45E | 92 | 42E | 9 | |
| 9 | HAX – 6 | -43 | 32E | 105 | 29E | 3 | |
| 10 | ? – 2 | -12 | 73E | 64 | 70E | 7 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.