Daily Sunspot Evaluation
Observation Sheet Saturday, 21 October 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)
- 5
- Number of spots (f)
- 40
- Relative number (R)
- 90
- Observer
- LT
- Reading
- all checks consistent
- File
- 19671021.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 16 | 16 | 8E | 52 | |||
| 2 | ? – 1 | 21 | 80E | 340 | |||
| 3 | B – 2 | 19 | 68E | 352 | |||
| 4 | D – 20 | 10 | 34E | 26 | |||
| 5 | J – 1 | 12 | 56E | 4 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.