Daily Sunspot Evaluation
Observation Sheet Sunday, 18 April 1976
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)
- 3
- Number of spots (f)
- 8
- Relative number (R)
- 38
- Observer
- FA
- Reading
- all checks consistent
- File
- 19760418.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 5 | 19E | 140 | 19E | ||
| 2 | B – 6 | -10 | 35E | 124 | 35E | ||
| 3 | J – 1 | 3 | 49W | 208 | 49W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.