Daily Sunspot Evaluation
Observation Sheet Tuesday, 10 February 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)
- 10
- Number of spots (f)
- 95
- Relative number (R)
- 195
- Observer
- SM
- Reading
- all checks consistent
- File
- 19700210.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 42 | 13 | 06E | 90 | |||
| 2 | A – 3 | -15 | 38E | 58 | |||
| 3 | A – 6 | -14 | 26E | 70 | |||
| 4 | A – 2 | -12 | 17E | 79 | |||
| 5 | H – 2 | -20 | 29E | 67 | |||
| 6 | A – 5 | -13 | 06E | 90 | |||
| 7 | A – 2 | -14 | 08W | 104 | |||
| 8 | C – 18 | -12 | 45W | 141 | |||
| 9 | B – 10 | -10 | 24W | 120 | |||
| 10 | A – 5 | 5 | 50W | 146 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.