Daily Sunspot Evaluation
Observation Sheet Saturday, 19 February 1972
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)
- 114
- Relative number (R)
- 194
- Observer
- ED
- Reading
- all checks consistent
- File
- 19720219.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 51 | 9 | 42E | 18 | |||
| 2 | G – 8 | -18 | 77E | 343 | |||
| 3 | G – 21 | -15 | 17E | 43 | |||
| 4 | C – 6 | -11 | 00 | 60 | |||
| 5 | E – 20 | -20 | 31W | 91 | |||
| 6 | J – 1 | -6 | 02W | 62 | |||
| 7 | G – 6 | 17 | 58W | 118 | |||
| 8 | A – 1 | 24 | 35W | 95 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.