Daily Sunspot Evaluation
Observation Sheet Saturday, 7 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)
- 7
- Number of spots (f)
- 39
- Relative number (R)
- 109
- Observer
- AT
- Reading
- all checks consistent
- File
- 19700207.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 19 | 44°E | 30 | |||
| 2 | B – 9 | -12 | 63°E | 71 | |||
| 3 | ? – 1 | -14 | 80°E | 54 | |||
| 4 | A – 1 | -10 | 15°E | 119 | |||
| 5 | A – 1 | -14 | 36°E | 38 | |||
| 6 | H – 2 | -19 | 68°E | 66 | |||
| 7 | ? – 24 | -12 | 05°W | 139 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.