Daily Sunspot Evaluation
Observation Sheet Saturday, 4 May 1974
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)
- 57
- Relative number (R)
- 137
- Observer
- ED
- Reading
- all checks consistent
- File
- 19740504.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | -4 | 14E | 225 | |||
| 2 | A – 1 | -6 | 22E | 217 | |||
| 3 | C – 8 | -8 | 36E | 203 | |||
| 4 | A – 7 | -10 | 43E | 196 | |||
| 5 | D – 30 | -13 | 49E | 190 | |||
| 6 | J – 1 | -14 | 67E | 172 | |||
| 7 | G – 2 | 7 | 63W | 302 | |||
| 8 | C – 7 | 4 | 34W | 273 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.