Daily Sunspot Evaluation
Observation Sheet Saturday, 20 June 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)
- 8
- Number of spots (f)
- 27
- Relative number (R)
- 107
- Observer
- EH
- Reading
- all checks consistent
- File
- 19700620.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 20 | 19E | 161 | |||
| 2 | A – 3 | 16 | 13E | 167 | |||
| 3 | J – 1 | 19 | 57E | 123 | |||
| 4 | ? – 3 | 11 | 81E | 99 | |||
| 5 | J – 1 | -4 | 35E | 145 | |||
| 6 | J – 2 | -9 | 05W | 185 | |||
| 7 | G – 13 | 18 | 44W | 224 | |||
| 8 | J – 2 | 21 | 32W | 212 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.