Daily Sunspot Evaluation
Observation Sheet Wednesday, 18 October 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)
- 12
- Number of spots (f)
- 48
- Relative number (R)
- 168
- Observer
- GA
- Reading
- all checks consistent
- File
- 19781018.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 12 | 30 | 28E | 319 | 26E | ||
| 2 | J – 3 | 18 | 19E | 328 | 17E | ||
| 3 | A – 1 | 20 | 23E | 324 | 21E | ||
| 4 | ? – 1 | 33 | 78E | 269 | 76E | ||
| 5 | ? – 1 | 28 | 79E | 268 | 77E | ||
| 6 | ? – 1 | -20 | 73E | 274 | 71E | ||
| 7 | E – 15 | -22 | 19W | 6 | 21W | ||
| 8 | G – 4 | -23 | 60W | 47 | 62W | ||
| 9 | A – 1 | -20 | 58W | 45 | 60W | ||
| 10 | J – 1 | -22 | 75W | 62 | 77W | ||
| 11 | D – 7 | 19 | 51W | 38 | 53W | ||
| 12 | H – 1 | 28 | 23W | 10 | 25W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.