Daily Sunspot Evaluation
Observation Sheet Monday, 27 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)
- 7
- Number of spots (f)
- 39
- Relative number (R)
- 109
- Observer
- EH
- Reading
- all checks consistent
- File
- 19700427.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 4 | 18 | 41E | 134 | |||
| 2 | J – 2 | 10 | 48E | 127 | |||
| 3 | D – 10 | -9 | 54E | 121 | |||
| 4 | D – 8 | -12 | 67E | 108 | |||
| 5 | D – 5 | -10 | 56W | 231 | |||
| 6 | B – 5 | 9 | 58W | 233 | |||
| 7 | G – 5 | 10 | 19W | 194 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.