Daily Sunspot Evaluation
Observation Sheet Monday, 7 December 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)
- 61
- Relative number (R)
- 131
- Observer
- HA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19701207.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 19 | 15 | 58E | 35 | |||
| 2 | E – 20 | -11 | 39E | 54 | |||
| 3 | J – 1 | -11 | 11W | 104 | |||
| 4 | C – 13 | -13 | 41W | 134 | |||
| 5 | H – 6 | -10 | 25W | 118 | |||
| 6 | J – 1 | 15 | 66W | 153 ⚠ | |||
| 7 | J – 1 | 21 | 45W | 142 ⚠ |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.