Daily Sunspot Evaluation
Observation Sheet Monday, 18 September 1978
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)
- 13
- Number of spots (f)
- 61
- Relative number (R)
- 191
- Observer
- ED
- Reading
- all checks consistent
- File
- 19780918.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 1 | 28 | 01E | 23 | 02W | ||
| 2 | A – 1 | 37 | 02E | 22 | 01W | ||
| 3 | F – 24 | 37 | 15E | 9 | 12E | ||
| 4 | C – 3 | 31 | 18E | 6 | 15E | ||
| 5 | ? – 3 | 26 | 77E | 307 | 74E | ||
| 6 | B – 3 | 15 | 50E | 334 | 47E | ||
| 7 | J – 1 | -21 | 45E | 339 | 42E | ||
| 8 | D – 14 | -27 | 15E | 9 | 12E | ||
| 9 | H – 5 | -17 | 28W | 52 | 31W | ||
| 10 | H – 1 | 15 | 47W | 71 | 44W | ||
| 11 | A – 1 | 15 | 17W | 41 | 20W | ||
| 12 | A – 3 | 19 | 16W | 40 | 19W | ||
| 13 | J – 1 | 37 | 08W | 32 | 11W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.