Daily Sunspot Evaluation
Observation Sheet Thursday, 23 July 1970
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)
- 69
- Relative number (R)
- 129
- Observer
- HA
- Reading
- all checks consistent
- File
- 19700723.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 4 | 22 | 61E | 43 | |||
| 2 | F – 50 | 8 | 14E | 90 | |||
| 3 | C – 4 | 17 | 58E | 46 | |||
| 4 | G – 8 | -14 | 58E | 46 | |||
| 5 | B – 2 | -21 | 62E | 42 | |||
| 6 | A – 1 | 16 | 36W | 140 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.