Daily Sunspot Evaluation
Observation Sheet Wednesday, 16 September 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)
- 11
- Number of spots (f)
- 38
- Relative number (R)
- 148
- Observer
- MA
- Reading
- all checks consistent
- File
- 19700916.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 19 | 80E | 17 | |||
| 2 | A – 1 | 8 | 50E | 47 | |||
| 3 | A – 1 | 5 | 62E | 35 | |||
| 4 | A – 1 | 1 | 49E | 48 | |||
| 5 | D – 6 | -16 | 60 | 37 | |||
| 6 | C – 6 | -22 | 11E | 86 | |||
| 7 | B – 3 | -14 | 0 | 97 | |||
| 8 | C – 8 | -11 | 20W | 117 | |||
| 9 | A – 1 | -16 | 58W | 155 | |||
| 10 | D – 9 | 12 | 09W | 106 | |||
| 11 | A – 1 | 12 | 03 | 100 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.