Daily Sunspot Evaluation
Observation Sheet Sunday, 12 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)
- 6
- Number of spots (f)
- 36
- Relative number (R)
- 96
- Observer
- SM
- Reading
- all checks consistent
- File
- 19700712.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 16 | 21E | 229 | |||
| 2 | D – 12 | 17 | 49E | 201 | |||
| 3 | D – 7 | -17 | 56E | 194 | |||
| 4 | G – 8 | -9 | 71W | 321 | |||
| 5 | A – 2 | 13 | 61W | 311 | |||
| 6 | H – 5 | 16 | 14W | 264 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.