Daily Sunspot Evaluation
Observation Sheet Thursday, 13 April 1967
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)
- 5
- Number of spots (f)
- 11
- Relative number (R)
- 61
- Observer
- LT
- Reading
- all checks consistent
- File
- 19670413.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 14 | 09°E | 55 | |||
| 2 | ? – 1 | 25 | 30°E | 334 | |||
| 3 | B – 3 | 13 | 43°W | 107 | |||
| 4 | H – 4 | 23 | 46°W | 110 | |||
| 5 | B – 2 | 14 | 19°W | 83 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.