Daily Sunspot Evaluation
Observation Sheet Wednesday, 15 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)
- 9
- Number of spots (f)
- 35
- Relative number (R)
- 125
- Observer
- SK
- Reading
- all checks consistent
- File
- 19700715.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 11 | 16 | 05E | 205 | |||
| 2 | A – 2 | 19 | 12E | 198 | |||
| 3 | A – 1 | -4 | 26E | 184 | |||
| 4 | A – 3 | -14 | 51E | 159 | |||
| 5 | C – 13 | -18 | 15E | 195 | |||
| 6 | J – 1 | 17 | 54W | 264 | |||
| 7 | J – 2 | 15 | 19W | 229 | |||
| 8 | A – 1 | 15 | 10W | 220 | |||
| 9 | A – 1 | 20 | 11W | 221 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.