Daily Sunspot Evaluation
Observation Sheet Thursday, 30 April 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)
- 54
- Relative number (R)
- 144
- Observer
- SM
- Reading
- all checks consistent
- File
- 19700430.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 17 | 20 | 0 | 135 | |||
| 2 | A – 1 | 11 | 05E | 130 | |||
| 3 | ? – 1 | 13 | 78E | 57 | |||
| 4 | ? – 1 | -12 | 74E | 61 | |||
| 5 | C – 15 | -10 | 26E | 109 | |||
| 6 | H – 4 | -8 | 13E | 122 | |||
| 7 | J – 1 | -15 | 55E | 80 | |||
| 8 | J – 1 | -20 | 62E | 73 | |||
| 9 | D – 13 | -14 | 26W | 161 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.