Daily Sunspot Evaluation
Observation Sheet Saturday, 15 August 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)
- 7
- Number of spots (f)
- 75
- Relative number (R)
- 145
- Observer
- MA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19700815.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 13 | 8 | 65E | 95 | |||
| 2 | B – 6 | -11 | 48E | 112 | |||
| 3 | D – 12 | -16 | 28E | 152 ⚠ | |||
| 4 | A – 5 | -10 | 11W | 171 | |||
| 5 | D – 14 | -9 | 20W | 180 | |||
| 6 | ? – 9 | 17 | 80W | 240 | |||
| 7 | E – 16 | 21 | 41W | 201 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.