Daily Sunspot Evaluation
Observation Sheet Monday, 21 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)
- 9
- Number of spots (f)
- 64
- Relative number (R)
- 154
- Observer
- DK
- Reading
- counts consistent, some coordinates doubtful
- File
- 19670821.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 27 | 54E | 32 ⚠ | |||
| 2 | E – 20 | 22 | 57E | 88 | |||
| 3 | A – 1 | 23 | 46E | 100 | |||
| 4 | A – 2 | 16 | 74E | 72 | |||
| 5 | D – 7 | 13 | 71E | 75 | |||
| 6 | A – 1 | 12 | 50E | 96 | |||
| 7 | H – 7 | -32 | 19W | 155 ⚠ | |||
| 8 | E – 23 | 7 | 59W | 105 ⚠ | |||
| 9 | J – 1 | 17 | 79W | 224 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.