Daily Sunspot Evaluation
Observation Sheet Thursday, 20 July 1967
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)
- 2
- Number of spots (f)
- 16
- Relative number (R)
- 36
- Observer
- SM
- Reading
- all checks consistent
- File
- 19670720.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 11 | -23 | 47E | 163 | |||
| 2 | C – 5 | -30 | 32E | 178 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.