Daily Sunspot Evaluation
Observation Sheet Sunday, 22 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)
- 99
- Relative number (R)
- 199
- Observer
- OG
- Reading
- counts consistent, some coordinates doubtful
- File
- 19810322.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HKC – 31 | 9 | 33W | 210 | 36W | 80 | |
| 2 | BXI – 12 | 14 | 16W | 192 | 19W | 6 | |
| 3 | HSX – 4 | 12 | 10W | 187 | 13W | 15 | |
| 4 | DAO – 5 | 20 | 02E | 175 | 01W | 8 | |
| 5 | HSI – 8 | 12 | 06E | 171 | 03E | 25 | |
| 6 | FKC – 27 | 15 | 34E | 142 | 21E | 135 | |
| 7 | HAX – 2 | 18 | 48E | 129 | 45E | 2 | |
| 8 | CSO – 5 | -18 | 28E | 129 ⚠ | 35E | 15 | |
| 9 | HAX – 4 | -28 | 42E | 120 ⚠ | 44E | 25 | |
| 10 | HSX – 1 | -44 | 65E | 112 | 62E | 2 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.