Daily Sunspot Evaluation
Observation Sheet Saturday, 15 April 1978
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)
- 9
- Number of spots (f)
- 67
- Relative number (R)
- 157
- Observer
- FA
- Reading
- all checks consistent
- File
- 19780415.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 16 | 17 | 04E | 279 | 04E | ||
| 2 | ? – 3 | 32 | 69E | 214 | 69E | ||
| 3 | ? – 1 | -29 | 80E | 203 | 80E | ||
| 4 | J – 1 | -44 | 36E | 247 | 36E | ||
| 5 | C – 6 | -20 | 08W | 291 | 08W | ||
| 6 | B – 12 | 19 | 22W | 305 | 22W | ||
| 7 | D – 26 | 13 | 11W | 294 | 11W | ||
| 8 | A – 1 | 29 | 17W | 300 | 17W | ||
| 9 | A – 1 | 19 | 04W | 287 | 04W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.