Daily Sunspot Evaluation
Observation Sheet Wednesday, 12 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)
- 77
- Relative number (R)
- 167
- Observer
- GA
- Reading
- all checks consistent
- File
- 19780412.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 7 | 19 | 21E | 302 | 21E | ||
| 2 | C – 17 | 15 | 34E | 292 | 31E | ||
| 3 | D – 19 | 18 | 47E | 279 | 44E | ||
| 4 | A – 1 | 21 | 60E | 266 | 57E | ||
| 5 | J – 1 | -44 | 71E | 255 | 68E | ||
| 6 | A – 4 | -35 | 21E | 305 | 18E | ||
| 7 | J – 3 | -29 | 05W | 331 | 08W | ||
| 8 | D – 16 | -29 | 41W | 7 | 44W | ||
| 9 | J – 9 | 18 | 67W | 33 | 70W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.