Daily Sunspot Evaluation
Observation Sheet Wednesday, 17 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)
- 6
- Number of spots (f)
- 77
- Relative number (R)
- 137
- Observer
- HA
- Reading
- all checks consistent
- File
- 19700617.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 21 | 59E | 162 | |||
| 2 | J – 1 | -24 | 78E | 143 | |||
| 3 | H – 3 | -10 | 36E | 185 | |||
| 4 | E – 9 | 17 | 45W | 266 | |||
| 5 | D – 19 | 16 | 20W | 241 | |||
| 6 | F – 44 | 17 | 01W | 222 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.