Daily Sunspot Evaluation
Observation Sheet Tuesday, 14 April 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)
- 11
- Number of spots (f)
- 96
- Relative number (R)
- 206
- Observer
- SM
- Reading
- all checks consistent
- File
- 19810414.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EAO – 7 | 8 | 75W | 309 | 78W | 19 | |
| 2 | EKC – 11 | 19 | 57W | 291 | 60W | 17 | |
| 3 | EKC – 24 | 14 | 01E | 233 | 02W | 14 | |
| 4 | DAC – 20 | 10 | 14E | 220 | 11E | 10 | |
| 5 | CAO – 4 | 23 | 60E | 174 | 57E | 7 | |
| 6 | BXC – 5 | 16 | 61E | 173 | 58E | 6 | |
| 7 | ? – 1 | 13 | 83E | 151 | 80E | ||
| 8 | BXO – 3 | -4 | 0 | 234 | 03W | 2.5 | |
| 9 | CAO – 5 | -4 | 15E | 219 | 12E | 5 | |
| 10 | AXX – 1 | -31 | 14E | 220 | 11E | ||
| 11 | CAI – 15 | -8 | 42E | 192 | 39E | 8.5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.