Daily Sunspot Evaluation
Observation Sheet Tuesday, 20 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)
- 13
- Relative number (R)
- 43
- Observer
- GA
- Reading
- all checks consistent
- File
- 19760420.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 11 | -9 | 11E | 125 | 08E | ||
| 2 | J – 1 | 2 | 73W | 209 | 76W | ||
| 3 | J – 1 | 5 | 04W | 140 | 07W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.