Daily Sunspot Evaluation
Observation Sheet Thursday, 17 August 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)
- 6
- Number of spots (f)
- 58
- Relative number (R)
- 118
- Observer
- SM
- Reading
- all checks consistent
- File
- 19670817.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 2 | ||||||
| 2 | H – 1 | ||||||
| 3 | H – 1 | ||||||
| 4 | E – 28 | ||||||
| 5 | B – 14 | ||||||
| 6 | E – 12 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.