Daily Sunspot Evaluation
Observation Sheet Monday, 30 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)
- 12
- Number of spots (f)
- 52
- Relative number (R)
- 172
- Observer
- OG
- Reading
- counts consistent, some coordinates doubtful
- File
- 19810330.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 6 | 14 | 27W | 147 ⚠ | 78W | ||
| 2 | CSI – 7 | 21 | 26W | 96 | 27W | 5.5 | |
| 3 | AXX – 1 | 14 | 14E | 56 | 13E | ||
| 4 | DAO – 9 | 26 | 46E | 24 | 45E | 9.25 | |
| 5 | HSX – 3 | 14 | 50E | 20 | 49E | 2 | |
| 6 | CSO – 3 | 3 | 51E | 19 | 50E | 3 | |
| 7 | HSX – 1 | 10 | 59E | 11 | 58E | 1 | |
| 8 | CSI – 9 | -15 | 50W | 120 | 51W | 5 | |
| 9 | HKX – 7 | -44 | 30W | 100 | 31W | 7.25 | |
| 10 | HSX – 1 | -11 | 01E | 69 | 00 | 1.75 | |
| 11 | HAX – 4 | -4 | 59E | 11 | 58E | 2 | |
| 12 | AXX – 1 | -7 | 59E | 11 | 58E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.