Daily Sunspot Evaluation
Observation Sheet Thursday, 21 September 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)
- 8
- Number of spots (f)
- 54
- Relative number (R)
- 134
- Observer
- SM
- Reading
- all checks consistent
- File
- 19670921.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 124 | 4°E | 93 | |||
| 2 | A – 7 | 16 | 5°E | 92 | |||
| 3 | B – 5 | 23 | 13°E | 84 | |||
| 4 | B – 2 | -22 | 4°E | 93 | |||
| 5 | E – 22 | -24 | 23°W | 120 | |||
| 6 | J – 1 | -30 | 48°W | 145 | |||
| 7 | B – 10 | 10 | 43°W | 146 | |||
| 8 | A – 5 | 27 | 2°W | 99 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.