Daily Sunspot Evaluation
Observation Sheet Tuesday, 11 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)
- 91
- Relative number (R)
- 181
- Observer
- GA
- Reading
- all checks consistent
- File
- 19780411.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 17 | 16 | 48E | 290 | 46E | ||
| 2 | C – 16 | 18 | 61E | 278 | 58E | ||
| 3 | J – 1 | -43 | 86E | 253 | 83E | ||
| 4 | J – 5 | -35 | 33E | 306 | 30E | ||
| 5 | C – 15 | -30 | 11E | 328 | 08E | ||
| 6 | D – 22 | -28 | 28W | 7 | 31W | ||
| 7 | E – 13 | 19 | 54W | 33 | 57W | ||
| 8 | A – 1 | 14 | 25W | 4 | 28W | ||
| 9 | A – 1 | 16 | 01W | 340 | 04W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.