Daily Sunspot Evaluation
Observation Sheet Sunday, 15 April 1956
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)
- 87
- Relative number (R)
- 197
- Observer
- WG
- Reading
- all checks consistent
- File
- 19560415.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | A – 8 | 0.5 | 14 | |
| 2 | C – 6 | 0.59 | 19 | |
| 3 | J – 1 | 0.67 | 92 | |
| 4 | J – 2 | 0.73 | 109 | |
| 5 | A – 1 | 0.63 | 114 | |
| 6 | C – 19 | 0.51 | 123 | |
| 7 | E – 35 | 0.25 | 139 | |
| 8 | H – 1 | 0.36 | 195 | |
| 9 | H – 1 | 0.89 | 274 | |
| 10 | J – 1 | 0.48 | 308 | |
| 11 | D – 12 | 0.35 | 353 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.