Daily Sunspot Evaluation
Observation Sheet Tuesday, 18 July 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)
- 8
- Number of spots (f)
- 38
- Relative number (R)
- 118
- Observer
- GA
- Reading
- all checks consistent
- File
- 19780718.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 12 | 03E | 120 | 00 | ||
| 2 | D – 3 | 18 | 13E | 110 | 10E | ||
| 3 | A – 2 | 11 | 11E | 112 | 08E | ||
| 4 | J – 3 | -23 | 01E | 122 | 02W | ||
| 5 | F – 16 | 17 | 46W | 169 | 48W | ||
| 6 | B – 2 | 11 | 15W | 138 | 18W | ||
| 7 | C – 8 | 16 | 18W | 141 | 21W | ||
| 8 | J – 2 | 13 | 05W | 128 | 08W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.