Daily Sunspot Evaluation
Observation Sheet Wednesday, 18 June 1969
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)
- 34
- Relative number (R)
- 114
- Observer
- SM
- Reading
- counts consistent, some coordinates doubtful
- File
- 19690618.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 12 | 9 | 16E | 327 | |||
| 2 | J – 2 | -16 | 18E | 325 | |||
| 3 | A – 3 | -21 | 01W | 344 | |||
| 4 | A – 5 | -15 | 06W | 349 | |||
| 5 | B – 4 | 15 | 47W | 30 | |||
| 6 | A – 3 | 19 | 41W | 24 | |||
| 7 | B – 4 | 23 | 43W | 26 | |||
| 8 | A – 1 | 8 | 40W | 353 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.