Daily Sunspot Evaluation
Observation Sheet Monday, 2 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)
- 9
- Number of spots (f)
- 33
- Relative number (R)
- 123
- Observer
- SM
- Reading
- all checks consistent
- File
- 19700202.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 2 | -10 | 56E | 143 | |||
| 2 | A – 4 | -9 | 12E | 187 | |||
| 3 | C – 6 | -18 | 34E | 165 | |||
| 4 | J – 1 | -32 | 30E | 169 | |||
| 5 | A – 3 | -18 | 52W | 251 | |||
| 6 | C – 3 | -9 | 67W | 266 | |||
| 7 | J – 1 | -3 | 69W | 268 | |||
| 8 | D – 9 | 19 | 37W | 236 | |||
| 9 | B – 4 | 13 | 25W | 224 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.