Daily Sunspot Evaluation
Observation Sheet Thursday, 13 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)
- 11
- Number of spots (f)
- 116
- Relative number (R)
- 226
- Observer
- GA
- Reading
- all checks consistent
- File
- 19780413.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 11 | 19 | 10E | 303 | 07E | ||
| 2 | C – 25 | 14 | 19E | 294 | 16E | ||
| 3 | C – 35 | 18 | 35E | 278 | 32E | ||
| 4 | A – 1 | 20 | 47E | 266 | 44E | ||
| 5 | J – 1 | -44 | 61E | 252 | 58E | ||
| 6 | B – 15 | -32 | 03W | 316 | 06W | ||
| 7 | A – 5 | -29 | 20W | 333 | 23W | ||
| 8 | D – 15 | -29 | 55W | 8 | 58W | ||
| 9 | ? – 5 | 17 | 77W | 30 | 80W | ||
| 10 | A – 2 | 20 | 32W | 345 | 35W | ||
| 11 | A – 1 | 16 | 27W | 340 | 30W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.