Daily Sunspot Evaluation
Observation Sheet Wednesday, 18 April 1979
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)
- 47
- Relative number (R)
- 127
- Observer
- GA
- Reading
- all checks consistent
- File
- 19790418.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 7 | 62E | 47 | 59E | 226 | |
| 2 | D – 18 | -23 | 20W | 129 | 23W | 222 | |
| 3 | B – 6 | -13 | 19W | 128 | 22W | 229 | |
| 4 | H – 1 | 4 | 36W | 145 | 39W | 215 | |
| 5 | J – 3 | 8 | 23W | 132 | 26W | 217 | |
| 6 | A – 1 | 11 | 28W | 137 | 31W | 230 | |
| 7 | G – 5 | 35 | 65W | 174 | 68W | 225 | |
| 8 | D – 12 | 31 | 15W | 124 | 18W | 221 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.