Daily Sunspot Evaluation
Observation Sheet Tuesday, 18 October 1977
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)
- 4
- Number of spots (f)
- 23
- Relative number (R)
- 63
- Observer
- GA
- Reading
- all checks consistent
- File
- 19771018.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 3 | 24 | 13E | 110 | 12E | ||
| 2 | B – 5 | 17 | 51W | 174 | 52W | ||
| 3 | E – 3 | 18 | 37W | 160 | 38W | ||
| 4 | D – 12 | 22 | 24W | 147 | 25W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.