Daily Sunspot Evaluation
Observation Sheet Thursday, 20 August 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)
- 11
- Number of spots (f)
- 54
- Relative number (R)
- 164
- Observer
- MÖ
- Reading
- all checks consistent
- File
- 19700820.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 10 | 8 | 01E | 93 | |||
| 2 | D – 12 | 21 | 21E | 73 | |||
| 3 | C – 7 | 18 | 55E | 39 | |||
| 4 | C – 4 | 13 | 41E | 53 | |||
| 5 | J – 1 | 5 | 66E | 28 | |||
| 6 | C – 7 | -6 | 12E | 82 | |||
| 7 | A – 1 | -13 | 15W | 109 | |||
| 8 | H – 3 | -18 | 58W | 152 | |||
| 9 | G – 5 | -16 | 66W | 160 | |||
| 10 | A – 3 | -14 | 74W | 168 | |||
| 11 | ? – 1 | -10 | 90W | 184 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.