Daily Sunspot Evaluation
Observation Sheet Tuesday, 30 July 1968
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)
- 6
- Number of spots (f)
- 72
- Relative number (R)
- 132
- Observer
- AT
- Reading
- all checks consistent
- File
- 19680730.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 25 | 15 | 9E | 277 | |||
| 2 | C – 36 | 8 | 8E | 278 | |||
| 3 | ? – 1 | -20 | 78W | 4 | |||
| 4 | ? – 1 | 9 | 82W | 8 | |||
| 5 | D – 4 | 10 | 56W | 342 | |||
| 6 | B – 5 | 30 | 36W | 322 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.