Daily Sunspot Evaluation
Observation Sheet Sunday, 21 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)
- 9
- Number of spots (f)
- 43
- Relative number (R)
- 133
- Observer
- EH
- Reading
- all checks consistent
- File
- 19700621.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 4 | 18 | 07E | 161 | |||
| 2 | J – 1 | 19 | 45E | 123 | |||
| 3 | ? – 3 | 23 | 77E | 91 | |||
| 4 | ? – 4 | 10 | 73E | 95 | |||
| 5 | H – 6 | -3 | 23E | 145 | |||
| 6 | J – 10 | -13 | 10E | 158 | |||
| 7 | H – 2 | -9 | 17W | 185 | |||
| 8 | H – 10 | 17 | 61W | 229 | |||
| 9 | J – 3 | 21 | 45W | 213 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.