Daily Sunspot Evaluation
Observation Sheet Friday, 18 July 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)
- 7
- Number of spots (f)
- 22
- Relative number (R)
- 92
- Observer
- SK
- Reading
- all checks consistent
- File
- 19690718.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 5 | 25 | 0° | 308 | |||
| 2 | J – 6 | 42 | 72°E | 236 | |||
| 3 | J – 1 | -14 | 73°W | 24 | |||
| 4 | J – 2 | 7 | 28°W | 336 | |||
| 5 | H – 2 | 41 | 25°W | 333 | |||
| 6 | A – 2 | 16 | 44°W | 352 | |||
| 7 | G – 4 | 21 | 63°W | 41 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.