Daily Sunspot Evaluation
Observation Sheet Thursday, 19 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)
- 8
- Number of spots (f)
- 131
- Relative number (R)
- 211
- Observer
- TY
- Reading
- all checks consistent
- File
- 19700219.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 5 | 4 | 58E | 280 | |||
| 2 | ? – 3 | -4 | 77E | 261 | |||
| 3 | J – 1 | -8 | 69E | 269 | |||
| 4 | E – 17 | -15 | 37E | 301 | |||
| 5 | H – 22 | -19 | 47E | 291 | |||
| 6 | E – 35 | -22 | 0 | 338 | |||
| 7 | D – 39 | -14 | 27W | 5 | |||
| 8 | G – 9 | 21 | 55W | 33 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.