Daily Sunspot Evaluation
Observation Sheet Monday, 13 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)
- 8
- Number of spots (f)
- 55
- Relative number (R)
- 135
- Observer
- FA
- Reading
- all checks consistent
- File
- 19700713.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 4 | 16 | 04E | 232 | |||
| 2 | B – 3 | 17 | 15E | 221 | |||
| 3 | D – 24 | 18 | 34E | 202 | |||
| 4 | G – 10 | -17 | 43E | 193 | |||
| 5 | ? – 3 | 14 | 73W | 309 | |||
| 6 | A – 2 | 13 | 49W | 285 | |||
| 7 | H – 6 | 16 | 27W | 260 | |||
| 8 | A – 3 | 20 | 43W | 279 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.