Daily Sunspot Evaluation
Observation Sheet Sunday, 18 June 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)
- 59
- Relative number (R)
- 169
- Observer
- HM
- Reading
- all checks consistent
- File
- 19780618.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 8 | 17 | 00 | 461 | 04W | ||
| 2 | J – 6 | 18 | 07E | 154 | 03E | ||
| 3 | B – 2 | 11 | 20E | 141 | 16E | ||
| 4 | ? – 1 | 20 | 79E | 82 | 75E | ||
| 5 | A – 2 | 11 | 28E | 133 | 24E | ||
| 6 | A – 2 | -16 | 57E | 104 | 53E | ||
| 7 | H – 11 | -23 | 46E | 115 | 42E | ||
| 8 | ? – 1 | 16 | 82W | 243 | 86W | ||
| 9 | D – 14 | 15 | 46W | 207 | 50W | ||
| 10 | J – 3 | 17 | 28W | 189 | 32W | ||
| 11 | B – 9 | 24 | 28W | 189 | 32W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.